segfault fix

daemon/call.c

@@ -2800,6 +2800,7 @@ void call_destroy(struct call *c) {
 	atomic64_add(&m->totalstats.total_nopacket_relayed_sess, total_nopacket_relayed_sess / 2);
 	atomic64_add(&m->totalstats_interval.total_nopacket_relayed_sess, total_nopacket_relayed_sess / 2);
 
+	if (c->monologues) {
 		ml = c->monologues->data;
 		if (ml->term_reason==TIMEOUT) {
 			atomic64_inc(&m->totalstats.total_timeout_sess);
@@ -2814,6 +2815,7 @@ void call_destroy(struct call *c) {
 			atomic64_inc(&m->totalstats.total_forced_term_sess);
 			atomic64_inc(&m->totalstats_interval.total_forced_term_sess);
 		}
+	}
 
 	timeval_totalstats_average_add(&m->totalstats, &tim_result_duration);
 	timeval_totalstats_average_add(&m->totalstats_interval, &tim_result_duration);