backends/scanner: fix tx_power missing in __repr__ when 0 (#1017)

0 is a valid value for tx_power, so we can't use a falsy check and
need to check for None instead.

CHANGELOG.rst

@@ -16,6 +16,10 @@ Changed
 * ``unpair`` function of ``BleakClient`` in WinRT backend can be called without being connected to remove stored device information
 * Use relative imports internally. Merged #1007.
 
+Fixed
+-----
+* Fixed ``tx_power`` not included in ``AdvertisementData.__repr__`` when 0. Merged #1017.
+
 `0.17.0`_ (2022-09-12)
 ======================
 

bleak/backends/scanner.py

@@ -52,7 +52,7 @@ def __repr__(self) -> str:
             kwargs.append(f"service_data={repr(self.service_data)}")
         if self.service_uuids:
             kwargs.append(f"service_uuids={repr(self.service_uuids)}")
-        if self.tx_power:
+        if self.tx_power is not None:
             kwargs.append(f"tx_power={repr(self.tx_power)}")
         return f"AdvertisementData({', '.join(kwargs)})"