This PR fixes the following TypeError by checking for response.result[0] before using it:
TypeError: response.result[0].find is not a function
at Handler.getSpeakerState (/usr/lib/node_modules/homebridge-bravia-tvos/src/accessories/accessory.handler.js:75:50)
at runMicrotasks (<anonymous>)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at Handler.poll (/usr/lib/node_modules/homebridge-bravia-tvos/src/accessories/accessory.handler.js:562:9)
This PR fixes the following TypeError by checking for response.result[0] before using it: