Crash - Few bugs fix

[A-Julien]

Hello,

I suggest these few bugs fix :

• Avoid error when ipcRequests doese not exist in the request array (lib/ipcInterface/_events.js)
• Fix crash when mpv restart or when the socket is closed
• Ensure that the socket is writable before write in send() function

Voila! I don't know if I made all the changes in the right way, so feel free to correct me;

[an-lee]

I truly hope this PR can be merged. @j-holub

[daerup]

@j-holub Please look into this, it looks promising!

[j-holub]

Hi guys,

sorry have been absent from GitHub for quite a while. I will look into this. Thanks for coming up with the fixes.