Blender Git Loki

fix issue with shrinkwrap face projection distance comparisons when using both positive and negative projection.
- don't attempt to convert the 'dist' value between local/target space, since all the projections are done in target space
and dist isnt used afterwards. Also, this could fail with non uniform scale - overwriting ray casts with larger dist values.
- added an assert to check larger dist values never overwrite smaller ones.
- remove use of sasqrt() since the value is checked beforehand anyway.