Don't crash on disconnect

[timhuff]

No description provided.

[TeruyaHaroldo]

@renanpupin

[thejoelw]

I can confirm this prevents android from crashing when cleanUpPublisher is called from onStreamDestroyed

[jukben]

Thanks for the PR. Is that somehow related to #89? @JWalker1995 @timhuff @HaroldoTeruya

[timhuff]

I'm not sure. They seem to both be the result of resource management going wrong at some point. Wish I could remember because I recall thinking I had a decent idea of what was happening... oh! My guess was that OpenTok's new SDK starting releasing the resource and then on disconnect, you would, too. Like double freeing a pointer. I think I concluded that it was ultimately TokBox's fault. I can tell you, though, that this fix has been deployed to thousands of users (who each have to use the app several times a day) without complaint for about 2 months now.

[infothien]

This fix my problem crash on Android phone when run Opentok.disconnect(SessionId). Please check it!

[timhuff]

Looks like the repo has implemented an equivalent change since this pull request was created.