Replaced contour-finding algorithm by one that handles undercuts.
Replaced contour-finding algorithm by one that handles undercuts.

svn path=/trunk/libavg/; revision=2562

libavg/libavg,yyd01245/libavg,scotty007/libavg,libavg/libavg,hoodie/libavg,hoodie/libavg,th3infinity/libavg,hoodie/libavg,th3infinity/libavg,hoodie/libavg,libavg/libavg,libavg/libavg,th3infinity/libavg,scotty007/libavg,yyd01245/libavg,scotty007/libavg,scotty007/libavg,th3infinity/libavg,yyd01245/libavg,yyd01245/libavg