Polish some bits to silence pychecker.
diff --git a/Tools/freeze/modulefinder.py b/Tools/freeze/modulefinder.py
index d38c9c6..7a97a04 100644
--- a/Tools/freeze/modulefinder.py
+++ b/Tools/freeze/modulefinder.py
@@ -6,7 +6,6 @@
 import imp
 import marshal
 import os
-import re
 import sys
 import new
 
@@ -122,6 +121,7 @@
             return q
         if m.__path__:
             self.ensure_fromlist(m, fromlist)
+        return None
 
     def determine_parent(self, caller):
         self.msgin(4, "determine_parent", caller)