Blender Git Loki

This commit fixes the following two coverity issues:

CID: 475
Checker: REVERSE_INULL (help)
File: base/src/source/blender/blenkernel/intern/cloth.c
Function: bvhselftree_build_from_cloth
Description: Pointer "clmd" dereferenced before NULL check

CID: 476
Checker: REVERSE_INULL (help)
File: base/src/source/blender/blenkernel/intern/cloth.c
Function: bvhtree_build_from_cloth
Description: Pointer "clmd" dereferenced before NULL check

You'll notice in the code the var is actually set again
a few lines down before being used so better to set it
after you've made sure the pointer is valid.

Kent