Import getToolByName, fixed NameError.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21005 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Url.py

@@ -27,6 +27,7 @@
 ##############################################################################
 
 from AccessControl import ClassSecurityInfo
+from Products.CMFCore.utils import getToolByName
 from Products.ERP5Type import Permissions, PropertySheet, Constraint, Interface
 from Products.ERP5Type.Base import Base
 from Products.ERP5.Document.Coordinate import Coordinate