Trigger an updown event when destroying an IKE_SA based on INITIAL_CONTACT

In other cases (i.e. when functions return DESTROY_ME) the event should
already be triggered, but not in this forced situation.

src/libcharon/sa/ike_sa_manager.c

@@ -1782,6 +1782,7 @@ METHOD(ike_sa_manager_t, check_uniqueness, bool,
 		{
 			DBG1(DBG_IKE, "destroying duplicate IKE_SA for peer '%Y', "
 				 "received INITIAL_CONTACT", other);
+			charon->bus->ike_updown(charon->bus, duplicate, FALSE);
 			checkin_and_destroy(this, duplicate);
 			continue;
 		}