update the class Folder instead of the module

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@190 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFCategory/Category.py

@@ -34,7 +34,7 @@ from Acquisition import aq_base, aq_inner, aq_parent
 
 from Products.ERP5Type import Permissions
 from Products.ERP5Type import PropertySheet
-from Products.ERP5Type.Document import Folder
+from Products.ERP5Type.Document.Folder import Folder
 
 from zLOG import LOG