Adding protection against calling tsrlibrary with no kinbody

Author: jeking04

src/prpy/tsr/tsrlibrary.py

@@ -81,7 +81,7 @@ def __call__(self, kinbody, action_name, *args, **kw_args):
         @return list of TSRChains
         """
         kinbody_name = kw_args.get('kinbody_name', None)
-        if kinbody_name is None:
+        if kinbody_name is None and kinbody is not None:
             kinbody_name = self.get_object_type(kinbody)
             logger.debug('Inferred KinBody name "%s" for TSR.', kinbody_name)