Crash when 'entity_picture' is missing

[errrrata]

On my HASS, probably because of some cameras being offline, I get the following error:

 Unhandled Error
 Traceback (most recent call last):
   File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 103, in callWithLogger
     return callWithContext({"system": lp}, func, *args, **kw)
   File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 86, in callWithContext
     return context.call({ILogContext: newCtx}, func, *args, **kw)
   File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 122, in callWithContext
     return self.currentContext().callWithContext(ctx, func, *args, **kw)
   File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 85, in callWithContext
     return func(*args,**kw)
 --- <exception caught here> ---
   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/_threadedselect.py", line 276, in _doReadOrWrite
     why = getattr(selectable, method)()
   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 243, in doRead
     return self._dataReceived(data)
   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 249, in _dataReceived
     rval = self.protocol.dataReceived(data)
   File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 290, in dataReceived
     self._dataReceived(data)
   File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1206, in _dataReceived
     self.consumeData()
   File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1218, in consumeData
     while self.processData() and self.state != WebSocketProtocol.STATE_CLOSED:
   File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1578, in processData
     fr = self.onFrameEnd()
   File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1703, in onFrameEnd
     self._onMessageEnd()
   File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 318, in _onMessageEnd
     self.onMessageEnd()
   File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 627, in onMessageEnd
     self._onMessage(payload, self.message_is_binary)
   File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 321, in _onMessage
     self.onMessage(payload, isBinary)
   File "/home/pi/homeassistant-gui/core/connectors/homeassistant.py", line 35, in onMessage
     self.factory.handler.handle_message(json.loads(payload.decode('utf8')))
   File "/home/pi/homeassistant-gui/core/connectors/homeassistant.py", line 84, in handle_message
     self.config['port']) + result['attributes']['entity_picture']
 builtins.KeyError: 'entity_picture'

Just adding an if 'entity_picture' in result['attributes'] seems to fix it, while still allowing 'working cameras' to be displayed

However (probably unrelated), the camera image doesn't seem to update on my SHPI.zero