Blender Git Loki

Optimize BVHTree creation of vertices that have BLI_bitmap test

Instead of reference the vertex first and test the bitmap afterwards. Test the bitmap first and reference the vertex after.

In a mesh with 31146 vertices and the entire bitmap disabled, the loop time is 243% faster
With all bitmap enabled, the time becomes 463473% faster!!!

One possible reason for this huge difference in peformance is that maybe the compiler is not putting the function "BM_vert_at_index" inline (I dont know if buildbot do this, but it's good to investigate).