Update index.js

[uronito]

With this modification if tv is unplugged or httrequest fails then homebridge plugin return state switch to off

Now seem run perfect!!!!!!

Thanks!!!!!!

[gw-wiscon]

Hi Uronito,
I checken, and I believe a better solution is to return an error.
In that way, homebridge will think that the power on request failed.
Which is actually true.

Can you verify if it works?