RANDOMIZE         269 contrib/libtests/pngvalid.c    RANDOMIZE(x);
RANDOMIZE         280 contrib/libtests/pngvalid.c    RANDOMIZE(x);
RANDOMIZE        6748 contrib/libtests/pngvalid.c       RANDOMIZE(ru);
RANDOMIZE        7282 contrib/libtests/pngvalid.c    RANDOMIZE(random_bytes);
RANDOMIZE        7307 contrib/libtests/pngvalid.c    RANDOMIZE(back);