title: Discord.py Get connected voice clients after reconnection
body: <p>I have a cog that does some audio stuff.  It stores the voice state in <code>self.voice</code> whenever the voice state updates (and limits actually updating it to when <code>member</code> is the bot.</p>
  <p>But when the bot stops and reruns (like killing the python process), it stays connected to the voice channel for several minutes before timing out and disconnecting.  I can't disconnect it manually because <code>self.voice</code> is just None initially.</p>
  <p>Is there a way to get the current voice state when the bot is run again, so I can set <code>self.voice</code>?  Alternatively, is there a way to immediately force disconnect the bot from any voice channels it's still in after restarting?</p>