Initialize exc_value to None, because notifyUser sometimes fails, because of a missing attribute.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16558 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/ActivityTool.py

@@ -108,6 +108,7 @@ class Message:
     self.kw = kw
     self.is_executed = 0
     self.exc_type = None
+    self.exc_value = None
     self.processing = None
     self.user_name = str(_getAuthenticatedUser(self))
     # Store REQUEST Info ?