Pylint fix

Author: bouwew

plugwise_usb/network/registry.py

@@ -252,8 +252,7 @@ async def register_node(self, mac: str) -> int:
 
         request = NodeAddRequest(self._send_to_controller, bytes(mac, UTF8), True)
         try:
-            response = await request.send()
-            if response is None:
+            if (response := await request.send()) is None:
                 raise NodeError(f"Failed to register node {mac}, no response received")
         except MessageError as exc:
             raise MessageError(f"Failed to register Node ({mac}) due to {exc}") from exc