remote: fix memory leak on host removal

The host address is allocated on the heap, hence it has to be freed when
freeing the containing struct.

Signed-off-by: David Bauer <mail@david-bauer.net>

remote.c

@@ -195,6 +195,7 @@ remote_node_free(struct usteer_remote_node *node)
 		return;
 
 	avl_delete(&remote_hosts, &host->avl);
+	free(host->addr);
 	free(host);
 }