Fix issue 426 - send messages to dead thread.

[MaTriXy]

issue #426

[ojw28]

Please style this code in the same way as the rest of the code base. It's very difficult to review it when virtually every line has changed due to application of a different code style.

[MaTriXy]

Sorry - i thought apply the code formatting fixed it..
Doing a revert now.

[ojw28]

Hm. This doesn't prevent the message in all cases, although probably catches most occurrences. I'll have a think.

[MaTriXy]

Hi,
I can't kill the handler from where we are but i can avoid sending messages when the tread is dead.
This way messages are not sent when not needed.

[thomaspaulmann]

What about this pull request? I have also issues with sending messages to a dead thread.
It happens when you're starting multiple streams in a short period of time. For example selecting the same video multiple times in a listview.
For clearance: Every click releases the current exo player instance and creates a new one with the specific streaming url.

[ojw28]

The only issue this causes is a warning in the logs. There are no user facing issues related to this warning. For now, I think we're ok doing nothing until we have time to think about a complete fix.

[ojw28]

This is fixed in a more correct way in the 2.x.x experimental branch. We're not planning to take a fix for 1.x, since the issue is largely benign.