presenceDate not set for XMPPResourceCoreDataStorageObject

[kas-kad]

presenceDate is always nil for any XMPPResourceCoreDataStorageObject, so there is no way to correctly compare two resources.
I've put following code:

    self.presenceDate = [presence delayedDeliveryDate];
    if (self.presenceDate == nil)
    {
        self.presenceDate = [[NSDate alloc] init];
    }

in XMPPResourceCoreDataStorageObject: - (void)updateWithPresence:(XMPPPresence *)presence to solve this problem.