fix issues introduced with defined_names.

jedi/api/classes.py

@@ -27,6 +27,12 @@ def defined_names(evaluator, scope):
     :type scope: Scope
     :rtype: list of Definition
     """
+    # Calling get_names_of_scope doesn't make sense always. It might include
+    # star imports or inherited stuff. Wanted?
+    # TODO discuss!
+    if isinstance(scope, pr.Module):
+        pair = scope, scope.get_defined_names()
+    else:
         pair = next(get_names_of_scope(evaluator, scope, star_search=False,
                                        include_builtin=False), None)
     names = pair[1] if pair else []