Scanner periodically crashes on Windows

[vmacari]

• bleak version:
  • bleak==0.20.2
  • bleak-winrt==1.2.0
• Python version: Python 3.11.3
• Operating System: Windows 10
• BlueZ version (bluetoothctl -v) in case of Linux: ?

Description

Scanning for devices

What I Did

self.devices = await BleakScanner.discover()

Logs

handle: <Handle BleakScannerWinRT._stopped_handler(<_bleak_winrt...002092A07A7F0>, <_bleak_winrt...002092A0EA710>)>
Traceback (most recent call last):
  File "...asyncio\events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "...\site-packages\bleak\backends\winrt\scanner.py", line 213, in _stopped_handler
    len(self.seen_devices), self.watcher.status
                            ^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'status'

[vmacari]

Added a pull request #1331