AutoDestroy parameter in FlxSound.loadEmbedded() and loadStream() does nothing

[axcho]

Looking at the code for FlxSound.loadEmbedded() and FlxSound.loadStream(), it is clear that the AutoDestroy parameter is never used. I would expect to see a line like this as the last line before the return statement in both those functions:
autoDestroy = AutoDestroy;

[osro]

I've made a pull request almost a year ago for this one already :D
#170