Blender Git Loki

Revert "Fix: Const warning in editmesh_knife.c"

It's important the coordinates the knife is operating on are never
manipulated since it will cause problems which are difficult to
troubleshoot.

Instead, use a cast in the MEM_freeN(..) call.

This reverts commit 8600d4491fa4b349cb80241382c503abaf9c5ce9.