Fix buglet in channel reassignment on SETUP_ACK

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@22866 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -9030,7 +9030,7 @@ static void *pri_dchannel(void *vpri)
 					ast_log(LOG_WARNING, "Received SETUP_ACKNOWLEDGE on unconfigured channel %d/%d span %d\n", 
 						PRI_SPAN(e->setup_ack.channel), PRI_CHANNEL(e->setup_ack.channel), pri->span);
 				} else {
-					chanpos = pri_fixup_principle(pri, chanpos, e->ring.call);
+					chanpos = pri_fixup_principle(pri, chanpos, e->setup_ack.call);
 					if (chanpos > -1) {
 						ast_mutex_lock(&pri->pvts[chanpos]->lock);
 						pri->pvts[chanpos]->setup_ack = 1;