PNG_OPTION_INVALID 1571 contrib/libtests/pngvalid.c                   ps->options[opt].setting) == PNG_OPTION_INVALID)
PNG_OPTION_INVALID 1700 contrib/libtests/pngvalid.c                ps->options[opt].setting) == PNG_OPTION_INVALID)
PNG_OPTION_INVALID 4124 png.c             return PNG_OPTION_INVALID;