fix typo

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15229 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/ERP5Site.py

@@ -938,7 +938,7 @@ class ERP5Site(FolderMixIn, CMFSite):
     if portal_object._getOb(expected_module_id, None) is not None:
       module_id = expected_module_id
     expected_module_id += '_module'
-    if module is None and portal_object._getOb(expected_module_id, None) \
+    if module_id is None and portal_object._getOb(expected_module_id, None) \
         is not None:
       module_id = expected_module_id
     # then look for module where the type is allowed