mplayer: fix crash when muted and audio codec fails

When audio codec initialization fails, reinit_audio_chain() will call
uninit_player() to close the AO. mpctx->ao is set, but mpctx->mixer.ao
is still NULL. uninit_player() assumes both variables are always the
same, and calls mixer_uninit(), even though mpctx->mixer.ao is NULL.
That function tries to access the ao without NULL check if mute was
enabled.

Fix this in mplayer.c by not relying on the assumption that
mpctx->ao == mpctx->mixer.ao. Also, add a check for NULL to mixer.c
(function muxer_uninit()). One of the checks is redundant and only one
of them is needed, but we add both for general robustness.

0 files changed, 0 insertions, 0 deletions