Blender Git Loki

Multires: Fix crash on exit when sculpting with modifiers

The SubdivCCG structure was re-allocated, but the cached one in
the sculpt session was still pointing to an original one.

This is rather a workaround, but is least evil from what i can
currently think. Remember something similar was also required in
2.7 as well.

Definitely need to revision this change.