CHUNK            1190 contrib/libtests/makepng.c #  define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d))
CHUNK            2443 contrib/libtests/pngvalid.c #define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d))