INTERLACE_LAST   3598 contrib/libtests/pngvalid.c            interlace_type < INTERLACE_LAST; ++interlace_type)
INTERLACE_LAST   4101 contrib/libtests/pngvalid.c            interlace_type < INTERLACE_LAST; ++interlace_type)
INTERLACE_LAST   5129 contrib/libtests/pngvalid.c            interlace_type < INTERLACE_LAST; ++interlace_type)