Fix 'NoneType' object has no attribute 'get'

[pantherale0]

Fix for

Traceback (most recent call last): File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 199, in handle_call_service await hass.services.async_call( File "/usr/src/homeassistant/homeassistant/core.py", line 1820, in async_call task.result() File "/usr/src/homeassistant/homeassistant/core.py", line 1857, in _execute_service await cast(Callable[[ServiceCall], Awaitable[None]], handler.job.target)( File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 216, in handle_service await service.entity_service_call( File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 798, in entity_service_call future.result() # pop exception if have File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 977, in async_request_call await coro File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 838, in _handle_entity_call await result File "/config/custom_components/pioneer_async/media_player.py", line 636, in async_select_sound_mode return await self._pioneer.set_listening_mode(sound_mode, self._zone) File "/usr/local/lib/python3.10/site-packages/aiopioneer/pioneer_avr.py", line 1370, in set_listening_mode if self.audio.get(zone).get("input_multichannel"): AttributeError: 'NoneType' object has no attribute 'get'