guitargeek), this commit enhances the support for temporary storage
for the structs EditVert, EditEdge, and EditFace. The field
"EditVert *vn" has been removed and replaced by a union called
"tmp" that can hold:
v, an EditVert pointer;
e, an EditEdge pointer;
f, an EditFace pointer;
fp, a float pointer;
p, a void pointer;
l, a long;
Please see the mailing list post here for more information about
this:
http://projects.blender.org/pipermail/bf-committers/2005-December/012877.html
b41a476401