Fix walrus

Author: bouwew

plugwise_usb/nodes/helpers/pulses.py

@@ -109,9 +109,9 @@ def collected_logs(self) -> int:
     @property
     def hourly_reset_time(self) -> datetime | None:
         """Provide the device hourly pulse reset time.""" 
-        if timestamp := self.cons_last_hourly_reset is not None:
+        if (timestamp := self.cons_last_hourly_reset) is not None:
             return timestamp
-        if timestamp := self.prod_last_hourly_reset is not None:
+        if (timestamp := self.prod_last_hourly_reset) is not None:
             return timestamp
         return None