auhal: do not destroy "audio-device" when AudioHardwarePropertyListener failed, but try to use it anyway.

It allows multiple Safari webplugins to play audio at the sametime, just as 2 vlc instances would do.
(cherry picked from commit 2df853a4d4ad41a63817da60cc9837374e00f88e)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>