Blender Git Loki

Fixed bug #21348, Hide selection in Edit Mode not working with some modifiers (VBOs)

Was actually a couple bugs:
* VBO bug was that hidden faces weren't being skipped correctly. Fixed that and rewrote this bit of VBO drawing code more clearly (less duplication, less unecessary state, and comments even)
* Second bug was that CCGDerivedMesh wasn't outputing ORIGINDEX data for faces. (it's not doing it for edges or verts either, but I don't know that we need it to.) At any rate, we do need this data for faces so that additional DerivedMeshes on top of subsurf know what faces in the editmesh are hidden.