Proper context cleanup on crash

What steps will reproduce the problem?
1. Throw exception while running in the render thread

What is the expected output? What do you see instead?
First of all, you may receive an OpenAL native error because the context was 
not cleaned up correctly. 2nd, the render context might have also not been 
uninitialized.
Perhaps a "context.cleanup()" method is needed in-cases when the context was 
not shutdown correctly. (To be called in context.stop() if it detects the 
context thread is already killed?)

Original issue reported on code.google.com by ShadowIs...@gmail.com on 4 May 2011 at 3:34

JuanCarlosAragon / jmonkeyengine

Proper context cleanup on crash #346