Imported from libpng-1.2.9beta4.tarv1.2.9beta4

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+
+Libpng 1.2.9beta4 - March 2, 2006
+
+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.
+
+Files available for download:
+
+Source files with LF line endings (for Unix/Linux) and with a
+"configure" script
+
+   1.2.9beta4.tar.gz
+   1.2.9beta4.tar.bz2
+
+Source files with CRLF line endings (for Windows), without the
+"configure" script
+
+   lp129b04.zip
+   lp129b04.tar.bz2
+
+Project files
+
+   1.2.9beta4-project-netware.zip
+   1.2.9beta4-project-wince.zip
+
+Other information:
+
+   1.2.9beta4-README.txt
+   1.2.9beta4-KNOWNBUGS.txt
+   1.2.9beta4-LICENSE.txt
+   1.2.9beta4-Y2K-compliance.txt
+
+Changes since the last public release (1.2.8):
+
+version 1.2.9beta1 [February 21, 2006]
+  Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
+  Fixed an incorrect typecast in pngrutil.c
+  Added PNG_NO_READ_SUPPORTED conditionals for making a write-only library.
+  Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
+  Optimized alpha-inversion loops in pngwtran.c
+  Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
+  Make sure num_trans is <= 256 before copying data in png_set_tRNS().
+  Make sure num_palette is <= 256 before copying data in png_set_PLTE().
+  Interchanged order of write_swap_alpha and write_invert_alpha transforms.
+  Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
+  Fixed inconsistency in definition of png_default_read_data()
+  Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
+    png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
+  Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
+  Added type cast (png_byte) in png_write_sCAL() (Cosmin).
+  Fixed scripts/makefile.cygwin (Cosmin).
+  Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
+  Updated scripts/pngos2.def, scripts/pngw32.def (Cosmin).
+  Updated references to png-mng-implement mailing list.
+  Revised man page and libpng.txt to make it clear that one should not call
+    png_read_end or png_write_end after png_read_png or png_write_png.
+  Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
+  Default iTXt support was inadvertently enabled.
+
+version 1.2.9beta2 [February 22, 2006]
+
+  Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
+    checking for png_read_dither in pngrtran.c
+  Revise checking of chromaticity limits to accommodate extended RGB
+    colorspace (John Denker).
+  Changed line endings in some of the project files to CRLF, even in the
+    "Unix" tar distributions (Cosmin).
+  Make png_get_int_32 and png_save_int_32 always available (Cosmin).
+  Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
+    with the newly exported functions.
+  Eliminated distributions without the "configure" script.
+  Updated INSTALL instructions.
+
+version 1.2.9beta3 [February 24, 2006]
+
+  Fix CRCRLF line endings in contrib/visupng/VisualPng.dsp
+  Make libpng.pc respect EXEC_PREFIX (D.P.Kreil)
+  Remove reference to pngasmrd.h from Makefile.am
+  Renamed CHANGES to ChangeLog.
+  Renamed LICENSE to COPYING.
+  Renamed ANNOUNCE to NEWS.
+  Created AUTHORS file.
+
+version 1.2.9beta4 [March 2, 2006]
+
+  Change definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
+  Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
+  Removed newline from the end of some error and warning messages.
+  Removed test for sqrt() from configure.ac and configure.
+  Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
+  Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
+  Disabled default iTXt support that was inadvertently enabled in
+    libpng-1.2.9beta1.
+  Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
+  Removed libpng version and date from *.c files.
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit 
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
+
+Glenn R-P