Dead instances are a singly linked list only

src/stratifier.c

@@ -1280,7 +1280,7 @@ static void drop_client(sdata_t *sdata, int64_t id)
 	}
 	/* Discard any dead instances that no longer hold any reference counts,
 	 * freeing up their memory safely */
-	DL_FOREACH_SAFE(sdata->dead_instances, client, tmp) {
+	LL_FOREACH_SAFE(sdata->dead_instances, client, tmp) {
 		if (!client->ref) {
 			LOGINFO("Stratifier discarding instance %ld", client->id);
 			LL_DELETE(sdata->dead_instances, client);