[patch] fix for admin template validator
|Reported by:||Owned by:||Adrian Holovaty|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
I don't know if anyone actually uses this but I saw it in the admin URLconf and tried it and found it was broken.
Simple fix to update it to use new MR api.