Do not allocate SIP pvt's for PEERs we can not reach.

This was seen as a lot of dialogs being created then immediately destroyed at reload/restart of the SIP channel.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@63748 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11563,6 +11563,10 @@ static int sip_send_mwi_to_peer(struct sip_peer *peer)
 	struct sip_pvt *p;
 	int newmsgs, oldmsgs;
 
+	/* Do we have an IP address? If not, skip this peer */
+	if (!peer->addr.sin_addr.s_addr && !peer->defaddr.sin_addr.s_addr) 
+		return 0;
+
 	/* Check for messages */
 	ast_app_messagecount(peer->mailbox, &newmsgs, &oldmsgs);