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).

2 files changed, 3 insertions, 3 deletions

diff --git a/lib-src/ebrowse.c b/lib-src/ebrowse.c
index d16c9ae54af..5c1e9d99bb8 100644
--- a/lib-src/ebrowse.c
+++ b/lib-src/ebrowse.c
@@ -1241,7 +1241,7 @@ dump_sym (FILE *fp, struct sym *root)
     putstr (NULL, fp);
 
   /* Print flags.  */
-  fprintf (fp, "%u", root->flags);
+  fprintf (fp, "%d", root->flags);
   putstr (root->filename, fp);
   putstr (root->regexp, fp);
   fprintf (fp, "%u", (unsigned) root->pos);
diff --git a/lib-src/hexl.c b/lib-src/hexl.c
index 490f72731b4..ac493c2740c 100644
--- a/lib-src/hexl.c
+++ b/lib-src/hexl.c
@@ -216,7 +216,7 @@ main (int argc, char **argv)
                   else
                     {
                       if (!i)
-                        printf ("%08lx: ", address);
+                        printf ("%08lx: ", address + 0ul);
 
                       if (iso_flag)
                         string[i+1] =
@@ -224,7 +224,7 @@ main (int argc, char **argv)
                       else
                         string[i+1] = (c < 0x20 || c >= 0x7F) ? '.' : c;
 
-                      printf ("%02x", c);
+                      printf ("%02x", c + 0u);
                     }
 
                   if ((i&group_by) == group_by)