Respect IKE version while selecting an ike_cfg as responder

src/libcharon/sa/ikev2/task_manager_v2.c

@@ -1077,7 +1077,8 @@ METHOD(task_manager_t, process_message, status_t,
 		ike_sa_id_t *ike_sa_id;
 		ike_cfg_t *ike_cfg;
 		job_t *job;
-		ike_cfg = charon->backends->get_ike_cfg(charon->backends, me, other);
+		ike_cfg = charon->backends->get_ike_cfg(charon->backends,
+												me, other, IKEV2);
 		if (ike_cfg == NULL)
 		{
 			/* no config found for these hosts, destroy */