update "fix a bug that SimpleAudioEngine may cause crash on i9100" 

Since the recreatePlayer function return bool, I think it will be better to determine whether the recreatePlayer function is successfully or not before call setEffectLooping function.

And, when I use "fix a bug that SimpleAudioEngine may cause crash on i9100", it still crashes sometime. I don't know why. So I change the code. It may be more safe, and I have not found the crash.

Hope can understand my English.