client-node: ignore io on the node itself

We only handle the io on the mixer ports, the internal io from the
port to the node is done on the client side.

src/modules/module-client-node/client-node.c

@@ -792,13 +792,10 @@ impl_node_port_set_io(struct spa_node *node,
 		      uint32_t id,
 		      void *data, size_t size)
 {
-	struct node *this;
-	struct impl *impl;
-
-	this = SPA_CONTAINER_OF(node, struct node, node);
-	impl = this->impl;
-
-	return do_port_set_io(impl, direction, port_id, SPA_ID_INVALID, id, data, size);
+	/* ignore io on the node itself, weonly care about the io on the
+	 * port mixers, the io on the node ports itself is handled on the
+	 * client side */
+	return 0;
 }
 
 static int