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Howard Trickey 2e2b405918 Fix 30169: rotate edge needs more checking for bad cases
If you tried to rotate an edge that was part of a chain
between two faces, the join faces function would remove
the whole chain (else it would leave a 'spur') and then
rotate edge would crash looking for a vertex that is no
longer there. 
Check for this case and disallow rotate if so.
2012-02-14 11:40:25 +00:00
..
2011-05-09 08:15:38 +00:00