support a business template whose revision is still empty.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26701 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_administration/SkinTemplateItem/portal_skins/erp5_administration/TemplateTool_deleteObsoleteTemplateList.xml

@@ -67,7 +67,7 @@ for bt in bt_list:\n
     if len([x for x in bt_list \\\n
      if x.getTitle() == bt.getTitle() and \\\n
         x.getInstallationState() == \'installed\' and \\\n
-        int(x.getRevision() or \'0\') > int(bt.getRevision())]):\n
+        int(x.getRevision() or \'0\') > int(bt.getRevision() or \'0\')]):\n
       delete_list.append(bt_id)\n
 \n
 print \'Deleted id list:%r\' % delete_list\n

bt5/erp5_administration/bt/revision

-60
\ No newline at end of file
+61
\ No newline at end of file