Fixed: objects with Vertex color were not rendering

added: now vertex colors get written as a simple pigment per vertex anytime there is some vertex color layer regardless of the vertex color paint or vertex color light toggles.

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4824 96b784f8-4ae3-dd11-aff7-0030488c597c