protect token_list -> _token_list

jedi/evaluate/finder.py

@@ -185,7 +185,7 @@ class NameFinder(object):
         types = []
         if stmt.is_global():
             # global keyword handling.
-            for token_name in stmt.token_list[1:]:
+            for token_name in stmt._token_list[1:]:
                 if isinstance(token_name, pr.Name):
                     return evaluator.find_types(stmt.parent, str(token_name))
         else: