[libpng15] Imported from libpng-1.5.29beta01.tarv1.5.29beta01

19 files changed, 70 insertions, 70 deletions

diff --git a/ANNOUNCE b/ANNOUNCE
index d43d487f0..96829e44f 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.29beta01 - March 30, 2017
+Libpng 1.5.29beta01 - April 1, 2017
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -26,12 +26,13 @@ Other information:
 
 Changes since the last public release (1.5.28):
 
-version 1.5.29beta01 [March 30, 2017]
+version 1.5.29beta01 [April 1, 2017]
   Suppress clang warnings about implicit sign changes in png.c
   Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
   Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
     makefile.linux and makefile.solaris-x86 (Cosmin).
-  Silence clang -Wcomma warnings (Viktor SzaKats).
+  Silence clang -Wcomma warnings (Viktor Szakats).
+  Update Sourceforge URLs in documentation (https instead of http).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index de907523b..26167a45e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4531,12 +4531,13 @@ version 1.5.28 [December 29, 2016]
   Fixed a potential null pointer dereference in png_set_text_2() (bug report
     and patch by Patrick Keshishian, CVE-2016-10087).
 
-version 1.5.29beta01 [March 30, 2017]
+version 1.5.29beta01 [April 1, 2017]
   Suppress clang warnings about implicit sign changes in png.c
   Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
   Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
     makefile.linux and makefile.solaris-x86 (Cosmin).
-  Silence clang -Wcomma warnings (Viktor SzaKats).
+  Silence clang -Wcomma warnings (Viktor Szakats).
+  Update Sourceforge URLs in documentation (https instead of http).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/LICENSE b/LICENSE
index f4de81747..058b3b268 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.5.29beta01, December 30, 2016 are
+libpng versions 1.0.7, July 1, 2000 through 1.5.29beta01, April 1, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -126,4 +126,4 @@ any encryption software.  See the EAR, paragraphs 734.3(b)(3) and
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 30, 2016
+April 1, 2017
diff --git a/README b/README
index 8c419be4b..2c2eee2aa 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.29beta01 - December 30, 2016 (shared library 15.0)
+README for libpng version 1.5.29beta01 - April 1, 2017 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -90,7 +90,7 @@ You may also want a copy of the PNG specification.  It is available
 as an RFC, a W3C Recommendation, and an ISO/IEC Standard.  You can find
 these at http://www.libpng.org/pub/png/documents/
 
-This code is currently being archived at libpng.sf.net in the
+This code is currently being archived at libpng.sourceforge.io in the
 [DOWNLOAD] area, and at ftp://ftp.simplesystems.org.  If you can't find it
 in any of those places, e-mail me, and I'll help you find it.
 
diff --git a/contrib/gregbook/README b/contrib/gregbook/README
index fd30f0581..4d7be4260 100644
--- a/contrib/gregbook/README
+++ b/contrib/gregbook/README
@@ -55,7 +55,7 @@ mation and links to the latest version of the source code, and Chapters
 13-15 of the book for detailed discussion of the three programs.
 
 Greg Roelofs
-http://pobox.com/~newt/greg_contact.html
+https://pobox.com/~newt/greg_contact.html
 16 March 2008
 
 
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index b0b75b94b..7f2852f7a 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -1,8 +1,8 @@
 
 /* pngvalid.c - validate libpng by constructing then reading png files.
  *
- * Last changed in libpng 1.6.27 [(PENDING RELEASE)]
- * Copyright (c) 2014-2016 John Cunningham Bowler
+ * Last changed in libpng 1.6.29 [(PENDING RELEASE)]
+ * Copyright (c) 2014-2017 John Cunningham Bowler
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -7742,13 +7742,11 @@ image_transform_png_set_rgb_to_gray_ini(const image_transform *this,
           * NOTE: this number only affects the internal limit check in pngvalid,
           * it has no effect on the limits applied to the libpng values.
           */
-         that->pm->limit += pow(
-#        if DIGITIZE
-            2.0
-#        else
-            1.0
-#        endif
-            /255, data.gamma);
+#if DIGITIZE
+          that->pm->limit += pow( 2.0/255, data.gamma);
+#else
+          that->pm->limit += pow( 1.0/255, data.gamma);
+#endif
       }
    }
 
diff --git a/libpng-manual.txt b/libpng-manual.txt
index df6e67c30..285e0c34b 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.29beta01 - December 30, 2016
+ libpng version 1.5.29beta01 - April 1, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.29beta01 - December 30, 2016
+ libpng versions 0.97, January 1998, through 1.5.29beta01 - April 1, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -47,17 +47,17 @@ file format in application programs.
 
 The PNG specification (second edition), November 2003, is available as
 a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
-<http://www.w3.org/TR/2003/REC-PNG-20031110/
+<https://www.w3.org/TR/2003/REC-PNG-20031110/
 The W3C and ISO documents have identical technical content.
 
 The PNG-1.2 specification is available at
-<http://png-mng.sourceforge.net/pub/png/spec/1.2/>.
+<https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
 It is technically equivalent
 to the PNG specification (second edition) but has some additional material.
 
-The PNG-1.0 specification is available as RFC 2083 
-<http://png-mng.sourceforge.net/pub/png/spec/1.0/> and as a
-W3C Recommendation <http://www.w3.org/TR/REC-png-961001>.
+The PNG-1.0 specification is available as RFC 2083
+<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
+W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
 
 Some additional chunks are described in the special-purpose public chunks
 documents at <http://www.libpng.org/pub/png/spec/register/>
@@ -3605,7 +3605,7 @@ However, there are some uncertainties about the status of local variables
 after a longjmp, so the user may want to be careful about doing anything
 after setjmp returns non-zero besides returning itself.  Consult your
 compiler documentation for more details.  For an alternative approach, you
-may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net),
+may wish to use the "cexcept" facility (see https://cexcept.sourceforge.io/),
 which is illustrated in pngvalid.c and in contrib/visupng.
 
 Beginning in libpng-1.4.0, the png_set_benign_errors() API became available.
@@ -3822,7 +3822,7 @@ in a MNG datastream.  As a minimum, it must have the MNG 8-byte signature
 and the MHDR and MEND chunks.  Libpng does not provide support for these
 or any other MNG chunks; your application must provide its own support for
 them.  You may wish to consider using libmng (available at
-http://www.libmng.com) instead.
+https://www.libmng.com/) instead.
 
 VII.  Changes to Libpng from version 0.88
 
@@ -4369,7 +4369,7 @@ control.  The git repository was built from old libpng-x.y.z.tar.gz files
 going back to version 0.70.  You can access the git repository (read only)
 at
 
-    git://git.code.sf.net/p/libpng/code
+    https://git.code.sf.net/p/libpng/code.git
 
 or you can browse it with a web browser by selecting the "code" button at
 
@@ -4379,7 +4379,7 @@ Patches can be sent to glennrp at users.sourceforge.net or to
 png-mng-implement at lists.sourceforge.net or you can upload them to
 the libpng bug tracker at
 
-    http://libpng.sourceforge.net
+    https://libpng.sourceforge.io/
 
 We also accept patches built from the tar or zip distributions, and
 simple verbal discriptions of bug fixes, reported either to the
@@ -4389,7 +4389,7 @@ mailing list, or directly to glennrp.
 XIII. Coding style
 
 Our coding style is similar to the "Allman" style
-(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
+(See https://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
 braces on separate lines:
 
     if (condition)
@@ -4479,7 +4479,7 @@ preprocessor macros begin with "PNG".  We request that applications that
 use libpng *not* begin any of their own symbols with either of these strings.
 
 Control keywords if, for, while, and switch are always followed by a space
-to distinguish them from function calls, which have no trailing space. 
+to distinguish them from function calls, which have no trailing space.
 
 We put a space after each comma and after each semicolon
 in "for" statements, and we put spaces before and after each
diff --git a/libpng.3 b/libpng.3
index 4e1ae53b1..260f83381 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "December 30, 2016"
+.TH LIBPNG 3 "April 1, 2017"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.29beta01
 .SH SYNOPSIS
@@ -496,7 +496,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.29beta01 - December 30, 2016
+ libpng version 1.5.29beta01 - April 1, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -507,7 +507,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.29beta01 - December 30, 2016
+ libpng versions 0.97, January 1998, through 1.5.29beta01 - April 1, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -543,17 +543,17 @@ file format in application programs.
 
 The PNG specification (second edition), November 2003, is available as
 a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
-<http://www.w3.org/TR/2003/REC-PNG-20031110/
+<https://www.w3.org/TR/2003/REC-PNG-20031110/
 The W3C and ISO documents have identical technical content.
 
 The PNG-1.2 specification is available at
-<http://png-mng.sourceforge.net/pub/png/spec/1.2/>.
+<https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
 It is technically equivalent
 to the PNG specification (second edition) but has some additional material.
 
-The PNG-1.0 specification is available as RFC 2083 
-<http://png-mng.sourceforge.net/pub/png/spec/1.0/> and as a
-W3C Recommendation <http://www.w3.org/TR/REC-png-961001>.
+The PNG-1.0 specification is available as RFC 2083
+<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
+W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
 
 Some additional chunks are described in the special-purpose public chunks
 documents at <http://www.libpng.org/pub/png/spec/register/>
@@ -4101,7 +4101,7 @@ However, there are some uncertainties about the status of local variables
 after a longjmp, so the user may want to be careful about doing anything
 after setjmp returns non-zero besides returning itself.  Consult your
 compiler documentation for more details.  For an alternative approach, you
-may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net),
+may wish to use the "cexcept" facility (see https://cexcept.sourceforge.io/),
 which is illustrated in pngvalid.c and in contrib/visupng.
 
 Beginning in libpng-1.4.0, the png_set_benign_errors() API became available.
@@ -4318,7 +4318,7 @@ in a MNG datastream.  As a minimum, it must have the MNG 8-byte signature
 and the MHDR and MEND chunks.  Libpng does not provide support for these
 or any other MNG chunks; your application must provide its own support for
 them.  You may wish to consider using libmng (available at
-http://www.libmng.com) instead.
+https://www.libmng.com/) instead.
 
 .SH VII.  Changes to Libpng from version 0.88
 
@@ -4865,7 +4865,7 @@ control.  The git repository was built from old libpng-x.y.z.tar.gz files
 going back to version 0.70.  You can access the git repository (read only)
 at
 
-    git://git.code.sf.net/p/libpng/code
+    https://git.code.sf.net/p/libpng/code.git
 
 or you can browse it with a web browser by selecting the "code" button at
 
@@ -4875,7 +4875,7 @@ Patches can be sent to glennrp at users.sourceforge.net or to
 png-mng-implement at lists.sourceforge.net or you can upload them to
 the libpng bug tracker at
 
-    http://libpng.sourceforge.net
+    https://libpng.sourceforge.io/
 
 We also accept patches built from the tar or zip distributions, and
 simple verbal discriptions of bug fixes, reported either to the
@@ -4885,7 +4885,7 @@ mailing list, or directly to glennrp.
 .SH XIII. Coding style
 
 Our coding style is similar to the "Allman" style
-(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
+(See https://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
 braces on separate lines:
 
     if (condition)
@@ -4975,7 +4975,7 @@ preprocessor macros begin with "PNG".  We request that applications that
 use libpng *not* begin any of their own symbols with either of these strings.
 
 Control keywords if, for, while, and switch are always followed by a space
-to distinguish them from function calls, which have no trailing space. 
+to distinguish them from function calls, which have no trailing space.
 
 We put a space after each comma and after each semicolon
 in "for" statements, and we put spaces before and after each
@@ -5167,7 +5167,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.29beta01 - December 30, 2016:
+Libpng version 1.5.29beta01 - April 1, 2017:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5192,7 +5192,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000, through 1.5.29beta01, December 30, 2016, are
+libpng versions 1.0.7, July 1, 2000, through 1.5.29beta01, April 1, 2017, are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -5316,7 +5316,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 30, 2016
+April 1, 2017
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index c0965fdf3..bf6ad2da9 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "December 30, 2016"
+.TH LIBPNGPF 3 "April 1, 2017"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.29beta01
 (private functions)
diff --git a/png.5 b/png.5
index 6e786e870..b0cbd2cfa 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "December 30, 2016"
+.TH PNG 5 "April 1, 2017"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -23,11 +23,11 @@ platforms.
 PNG specification (second edition), November 2003:
 .IP
 .br
-  <http://www.w3.org/TR/2003/REC-PNG-20031110/
+  <https://www.w3.org/TR/2003/REC-PNG-20031110/
 PNG 1.2 specification, July 1999:
 .IP
 .br
-http://png-mng.sourceforge.net/pub/png/spec/1.2/
+https://png-mng.sourceforge.io/pub/png/spec/1.2/
 .LP
 PNG 1.0 specification, October 1996:
 .IP
@@ -35,11 +35,11 @@ PNG 1.0 specification, October 1996:
 RFC 2083
 .IP
 .br
-http://www.ietf.org/rfc/rfc2083.txt
+https://www.ietf.org/rfc/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
-http://www.w3.org/TR/REC-png-961001
+https://www.w3.org/TR/REC-png-961001
 .SH AUTHORS
 This man page: Glenn Randers-Pehrson
 .LP
diff --git a/png.c b/png.c
index 663d9a48c..a9e614c54 100644
--- a/png.c
+++ b/png.c
@@ -656,14 +656,14 @@ png_get_copyright(png_const_structp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.29beta01 - March 30, 2017" PNG_STRING_NEWLINE \
+     "libpng version 1.5.29beta01 - April 1, 2017" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
      PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.5.29beta01 - March 30, 2017\
+      return "libpng version 1.5.29beta01 - April 1, 2017\
       Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index 0ef8a7583..bf290d6fa 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.29beta01, December 30, 2016
+ * libpng version 1.5.29beta01, April 1, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.5.29beta01, December 30, 2016:
+ *   libpng versions 0.97, January 1998, through 1.5.29beta01, April 1, 2017:
  *     Glenn Randers-Pehrson.
  *   See also "Contributing Authors", below.
  */
@@ -25,7 +25,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000 through 1.5.29beta01, December 30, 2016 are
+ * libpng versions 1.0.7, July 1, 2000 through 1.5.29beta01, April 1, 2017 are
  * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
  * derived from libpng-1.0.6, and are distributed according to the same
  * disclaimer and license as libpng-1.0.6 with the following individuals
@@ -228,14 +228,14 @@
  *
  * See libpng.txt or libpng.3 for more information.  The PNG specification
  * is available as a W3C Recommendation and as an ISO Specification,
- * <http://www.w3.org/TR/2003/REC-PNG-20031110/
+ * <https://www.w3.org/TR/2003/REC-PNG-20031110/
  */
 
 /*
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 30, 2016
+ *    April 1, 2017
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -304,7 +304,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.5.29beta01"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.29beta01 - December 30, 2016\n"
+     " libpng version 1.5.29beta01 - April 1, 2017\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
diff --git a/pngconf.h b/pngconf.h
index e1ccf6062..f14d11040 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.29beta01, December 30, 2016
+ * libpng version 1.5.29beta01, April 1, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngrtran.c b/pngrtran.c
index df6eda9cb..555760467 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -3186,7 +3186,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
  * using the equation given in Poynton's ColorFAQ of 1998-01-04 at
  * <http://www.inforamp.net/~poynton/>  (THIS LINK IS DEAD June 2008 but
  * versions dated 1998 through November 2002 have been archived at
- * http://web.archive.org/web/20000816232553/http://www.inforamp.net/
+ * https://web.archive.org/web/20000816232553/www.inforamp.net/
  * ~poynton/notes/colour_and_gamma/ColorFAQ.txt )
  * Charles Poynton poynton at poynton.com
  *
diff --git a/projects/owatcom/pngconfig.mak b/projects/owatcom/pngconfig.mak
index 054a3fc20..3ef2948ca 100644
--- a/projects/owatcom/pngconfig.mak
+++ b/projects/owatcom/pngconfig.mak
@@ -126,7 +126,7 @@ $# to work, download Brian Kernighan's awk (Brian Kernighan is the author of
 $# awk.)  You can find source code and a built executable (called awk95.exe)

 $# here:

 $#

-$#     http://www.cs.princeton.edu/~bwk/btl.mirror/

+$#     https://www.cs.princeton.edu/~bwk/btl.mirror/

 $#

 $# The executable works just fine.

 $#

diff --git a/projects/vstudio/README.txt b/projects/vstudio/README.txt
index 79a3241a7..63e4657e9 100644
--- a/projects/vstudio/README.txt
+++ b/projects/vstudio/README.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.29beta01 - December 30, 2016
+libpng version 1.5.29beta01 - April 1, 2017
 
 Copyright (c) 2010,2013,2016 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index 679f50e84..85c4e619d 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.29beta01 - December 30, 2016
+ * libpng version 1.5.29beta01 - April 1, 2017
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 0a2f3e699..217212969 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.5.29beta01 - December 30, 2016
+Makefiles for  libpng version 1.5.29beta01 - April 1, 2017
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 8b7745346..2de36855e 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,7 +1,7 @@
 /* 1.5.29beta01 STANDARD API DEFINITION */
 /* pnglibconf.h - library build configuration */
 
-/* libpng version 1.5.29beta01 - December 30, 2016 */
+/* libpng version 1.5.29beta01 - April 1, 2017 */
 
 /* Copyright (c) 2011-2015 Glenn Randers-Pehrson */