Fix ImportError

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44054 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -4567,9 +4567,13 @@ Business Template is a set of definitions, such as skins, portal types and categ
       # Make sure that everything is sane.
       self.clean()
 
+      try:
+        from Products.ERP5VCS.WorkingCopy import NotAWorkingCopyError
         try:
           self.setRevision(self.getVcsTool().newRevision())
         except NotAWorkingCopyError:
+          raise ImportError
+      except ImportError:
         self.updateRevisionNumber()
       self._setTemplateFormatVersion(1)
       self.storeTemplateItemData()