Handle None erturned by self.parent.principalForRecord(relative) in _getRelatives(). Log it as an error, but don't add None to the relatives list.
Handle None erturned by self.parent.principalForRecord(relative) in _getRelatives().
Log it as an error, but don't add None to the relatives list.


git-svn-id: 81e381228600e5752b80483efd2b45b26c451ea2@1927 e27351fd-9f3e-4f54-a53b-843176b1656c

trevor/calendarserver,trevor/calendarserver,trevor/calendarserver