If somehow we don't have an answer, set need to destroy on CANCEL

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1717 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -5111,6 +5111,8 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
 		}
 		if (p->owner)
 			ast_queue_hangup(p->owner, 0);
+		else
+			p->needdestroy = 1;
 		transmit_response(p, "200 OK", req);
 		transmit_response_reliable(p, "487 Request Terminated", &p->initreq);
 	} else if (!strcasecmp(cmd, "BYE")) {