[Bf-committers] Sculpt Smooth Tool Patch

[Jason Wilkins]

http://projects.blender.org/tracker/?func=detail&aid=31425&group_id=9&atid=127

In another project I learned that malloc can be a serious bottleneck
inside an inner loop, so when I saw that being done with the sculpt
smooth tool I moved the memory allocation outside the main stroke loop
and to the beginning of the stroke.

It could probably be made even more efficient by only allocating a
temp mask or temp coordinates, but that would complicate the code and
it has already gone from O(n) to O(1).