fix: undefined name 'ERROR'.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19212 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/ActivityTool.py

@@ -53,7 +53,7 @@ from BTrees.OIBTree import OIBTree
 from ZODB.POSException import ConflictError
 from Products.MailHost.MailHost import MailHostError
 
-from zLOG import LOG, INFO, WARNING
+from zLOG import LOG, INFO, WARNING, ERROR
 
 try:
   from Products.TimerService import getTimerService