[MPlayer-dev-eng] Balance keys crash ac3 playback

[Reimar Döffinger]

On Mon, Mar 24, 2014 at 04:50:33PM +0100, Ingo Brückl wrote:
> With plain MPlayer and an ac3 audio file, pressing the balance keys '(' or
> ')' results in a crash.

It's not a complete fix since it's not "idiot-proof" against this
happening again, but it should be fixed with the fixed af_add that
tries to undo its changes at the end.