Error, NoneType logged after every update

[kiptonk]

Whenever I call Switchbot.update(), press(), or turn_on() it logs the following twice:

No advertisement data to update
NoneType: None

I traced it to here:

pySwitchbot/switchbot/devices/device.py

Lines 644 to 646 in 31e2381

	if not self._sb_adv_data:
	_LOGGER.exception("No advertisement data to update")
	return

But I'm not sure of the fix. There is a failed check on advertising data but that seems intentional because of:

pySwitchbot/switchbot/devices/device.py

Lines 831 to 836 in 31e2381

	class SwitchbotDeviceOverrideStateDuringConnection(SwitchbotBaseDevice):
	"""Base Representation of a Switchbot Device.
	This base class ignores the advertisement data during connection and uses the
	data from the device instead.
	"""

The return of None and Logger.exception() seem erroneous but maybe something higher up is the better fix.