Walrus fix

Author: bouwew

plugwise_usb/network/registry.py

@@ -250,9 +250,7 @@ async def register_node(self, mac: str) -> int:
 
         request = NodeAddRequest(self._send_to_controller, bytes(mac, UTF8), True)
         try:
-            response = await request.send()
-            # _LOGGER.debug("NodeAddReq response: %s, %s", response.response_type, response.ack_id)
-            if response is None:  # or response.ack_id != NodeResponseType.JOIN_ACCEPTED:
+            if (response := await request.send()) is None:  # or response.ack_id != NodeResponseType.JOIN_ACCEPTED:
                 raise NodeError(f"Failed to register node {mac}")
         except MessageError as exc:
             raise MessageError(f"Failed to register Node with {mac}") from exc