Unregister SipListenerEvent

[morvader]

In RegisterHandler.java file, at successResponseReceived method, register successfull event is raised even when you are actually unregistering.

At then end of the method, the [ !"0".equals(expires) ] check does not have any effect, so event is raised anyway

if (sipListener != null) {
     sipListener.registerSuccessful(sipResponse);
}

Thaks for such a great effort!

[ymartineau]

maybe this expires != 0 test has no effect because expires is not a parameter in contact header but a header of its own. But you're right, it should probably be fixed (get expires parameter in contact header and if it's not found try to get Expires header and depending on this value, notify or not sipListener)