Python API

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Bugfix #8615: NMesh.update() did not check if faces had less than 3 vertices, so would create bogus faces.  

Also discovered in the process that documentation and error message for Mesh.assignVertsToGroup() was wrong.

source/blender/python/api2_2x/doc/Mesh.py

@@ -987,7 +987,7 @@ class Mesh:
 		@param group: the name of a vertex group.
 		"""
 
-	def assignVertsToGroup(group, vertList, weight, assignmode = AssignModes['REPLACE']):
+	def assignVertsToGroup(group, vertList, weight, assignmode):
 		"""
 		Adds an array (a Python list) of vertex points to a named vertex group
 		associated with a mesh. The vertex list is a list of vertex indices from