The assertion that peer was not found on final event

message was being triggered on configuration reload.
This patch changes that case to just return instead.

Review: https://reviewboard.asterisk.org/r/3953/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@422358 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -16656,7 +16656,10 @@ static void mwi_event_cb(void *userdata, struct stasis_subscription *sub, struct
 	struct sip_peer *peer = sip_find_peer(peer_name, NULL, TRUE, FINDALLDEVICES, FALSE, 0);
 
 	if (stasis_subscription_final_message(sub, msg)) {
-		ast_assert(peer == NULL);
+		if (peer) {
+			/* configuration reloaded */
+			return;
+		}
 		ast_free(peer_name);
 		return;
 	}