Do not skip sending MWI for a peer if an address is defined. Really just a merge mistake from IPv6

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@276389 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -23835,7 +23835,7 @@ static int sip_send_mwi_to_peer(struct sip_peer *peer, const struct ast_event *e
 		return 0;
 
 	/* Do we have an IP address? If not, skip this peer */
-	if (ast_sockaddr_isnull(&peer->addr) || ast_sockaddr_isnull(&peer->defaddr))
+	if (ast_sockaddr_isnull(&peer->addr) && ast_sockaddr_isnull(&peer->defaddr))
 		return 0;
 
 	if (event) {