client: Reorder interface creation ops

Add the newly created proxy objects into the queue before the
interface specific initialization logic takes place. This way the new
proxy objects can be used within the initialization procedures.

client/dbus-proxy.c

@@ -572,10 +572,10 @@ static void proxy_interface_create(const char *path,
 		proxy->path = l_strdup(path);
 		proxy->type = interface_type;
 
+		l_queue_push_tail(proxy_interfaces, proxy);
+
 		if (interface_type->ops && interface_type->ops->create)
 			proxy->data = interface_type->ops->create();
-
-		l_queue_push_tail(proxy_interfaces, proxy);
 	}
 }