Fixed a weird bug that caused wrong check on self-intersections and polychord's adjacency.

git-svn-id: svn://svn.code.sf.net/p/vcg/code/trunk/vcglib@5499 e8973e21-934d-0410-ac44-de4585f5606d
Changed a wrong (fortunately not used) enum value.

git-svn-id: svn://svn.code.sf.net/p/vcg/code/trunk/vcglib@5500 e8973e21-934d-0410-ac44-de4585f5606d