png_sPLT          119 contrib/libtests/pngunknown.c #define png_sPLT PNG_U32(115,  80,  76,  84)
png_sPLT          128 contrib/tools/pngfix.c #define png_sPLT PNG_U32(115,  80,  76,  84)
png_sPLT          771 pngpriv.h      #define png_sPLT PNG_U32(115,  80,  76,  84)