Port --enable-gcc-warnings to GCC 5.1 x86-64

* lib-src/ebrowse.c (dump_sym):
* lib-src/hexl.c (main):
* src/ccl.c (ccl_driver):
* src/character.c (string_escape_byte8):
* src/dbusbind.c (xd_retrieve_arg, xd_add_watch):
* src/gnutls.c (Fgnutls_boot):
* src/gtkutil.c (xg_check_special_colors):
* src/image.c (x_build_heuristic_mask):
* src/print.c (safe_debug_print, print_object):
* src/term.c (produce_glyphless_glyph):
* src/xdisp.c (get_next_display_element)
(produce_glyphless_glyph):
* src/xterm.c (x_draw_glyphless_glyph_string_foreground):
Don't use a signed format to print an unsigned integer, or vice
versa.  GCC 5.1's new -Wformat-signedness option warns about this.
* src/image.c (png_load_body, jpeg_load_body):
Silence a bogus setjump diagnostic from GCC 5.1 (GCC bug 54561).

1 files changed, 5 insertions, 3 deletions

diff --git a/src/term.c b/src/term.c
index 15d33b4e3ee..d2a9c3d1f30 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1862,9 +1862,11 @@ produce_glyphless_glyph (struct it *it, Lisp_Object acronym)
       else
 	{
 	  eassert (it->glyphless_method == GLYPHLESS_DISPLAY_HEX_CODE);
-	  len = (it->c < 0x10000 ? sprintf (buf, "\\u%04X", it->c)
-		 : it->c <= MAX_UNICODE_CHAR ? sprintf (buf, "\\U%06X", it->c)
-		 : sprintf (buf, "\\x%06X", it->c));
+	  len = sprintf (buf,
+			 (it->c < 0x10000 ? "\\u%04X"
+			  : it->c <= MAX_UNICODE_CHAR ? "\\U%06X"
+			  : "\\x%06X"),
+			 it->c + 0u);
 	}
       str = buf;
     }