check_handling   1020 contrib/libtests/pngunknown.c    check_handling(d, def, flags[0][0] | flags[0][1], flags[1][0], flags[1][1],
check_handling   1022 contrib/libtests/pngunknown.c    check_handling(d, def, flags[0][2] | flags[0][3], flags[1][2], flags[1][3],