BGE: Fix for [#34382] "Vertex position doesn't update when set through Python and "Cast Buffer Shadows" is disabled" reported by V.R. (rolle).

The BucketManager was assuming that all modified meshes were rendered when a render pass completed. However, materials that did not cast buffer shadows did not render during the shadow rendering step, and thus were never updated.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56639 954f8c5b-7b00-dc11-b283-0030488c597c