Indicated spot where extra setuptools >= 0.7 check needs to happen

--HG--
branch : distribute
extra : rebase_source : 6b80caf47a8c7642e629af9f271f33e25a7c890f

pkg_resources.py

@@ -2239,6 +2239,10 @@ class Distribution(object):
         """Insert self.location in path before its nearest parent directory"""
 
         loc = loc or self.location
+
+        # TODO: raise error if we're adding setuptools >= 0.7 as that is
+        # guaranteed to be incompatible with distribute.
+
         if not loc:
             return