DupDispose       1174 magick/layer.c                 disposals[i-1]=DupDispose;
DupDispose       1301 magick/layer.c             if ( disposals[i-1] == DupDispose )
DupDispose       1315 magick/layer.c     if ( disposals[i-1] == DupDispose )
DupDispose       1323 magick/layer.c          disposals[i-1]=DupDispose;
DupDispose       1398 magick/layer.c     if ( disposals[i] == DupDispose ) {