Another fix for bpy.props getters/setters: PyC_AsArray does a refcount decrement internally on errors, need to skip Py_DECREF in that case to avoid negative refcounts.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53706 954f8c5b-7b00-dc11-b283-0030488c597c
simple speedup for view3d numeric panel - dont loop on verts or edges if none are selected.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53707 954f8c5b-7b00-dc11-b283-0030488c597c