fix for error in editmesh derived callbacks, emDM_getVert(), emDM_getEdge(), emDM_getTessFace().
Currently the functions aren't used since they would fail have failed immediately.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56023 954f8c5b-7b00-dc11-b283-0030488c597c