Issue11 Editing...

Traceback (most recent call last):
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/cgi/client.py",
line 412, in handle_action
    getattr(self, method)()
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/cgi/client.py",
line 691, in editItemAction
    props = self._changenode(props)
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/cgi/client.py",
line 1030, in _changenode
    return cl.set(self.nodeid, **props)
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/backends/back_anydbm.py",
line 1290, in set
    self.fireReactors('set', nodeid, oldvalues)
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/backends/back_anydbm.py",
line 1869, in fireReactors
    react(self.db, self, nodeid, oldvalues)
  File
"/home/richardjones/instances/demo/detectors/nosyreaction.py",
line 40, in nosyreaction
    cl.nosymessage(nodeid, msgid, oldvalues)
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/roundupdb.py",
line 147, in nosymessage
    self.send_message(nodeid, msgid, note, sendto)
  File
"/home/richardjones/lib/python2.2/site-packages/roundup/roundupdb.py",
line 227, in send_message
    writer.addheader('To', ', '.join(sendto))
TypeError: sequence item 0: expected string, NoneType found