png_sig_cmp      7801 src/image.c    DEF_DLL_FN (int, png_sig_cmp, (png_bytep, png_size_t, png_size_t));
png_sig_cmp      7847 src/image.c      LOAD_DLL_FN (library, png_sig_cmp);
png_sig_cmp      8077 src/image.c    	  || png_sig_cmp (sig, 0, sizeof sig))
png_sig_cmp      8099 src/image.c    	  || png_sig_cmp (tbr.bytes, 0, sizeof sig))