use FakeStatement instead of strange Statement constructions

jedi/evaluate/helpers.py

@@ -163,8 +163,8 @@ class FakeSubModule():
 
 
 class FakeStatement(pr.Statement):
-    def __init__(self, expression_list):
-        p = 0, 0
+    def __init__(self, expression_list, start_pos=(0, 0)):
+        p = start_pos
         super(FakeStatement, self).__init__(FakeSubModule, expression_list, p, p)
         self._expression_list = expression_list