macosx: fix position and functionality of buttons when jump buttons are activated
AudioQueue: fix flush if wait is true
vout_ios: show correct AR even if it changes mid stream
Use waveOutSetVolume to set volume instead of pure software gain
vout_macosx: protect vout_display_SendEvent calls to prevent potential crashes
README: remove mention to folder that doesn't exist anymore

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
libmp4: minor bug fix

If we read all the stream but n bytes, 0 < n < 8, there's no point to
try and read these n missing bytes.

If we try to continue the parsing, MP4_ReadBoxCommon() would return 0,
and VLC would fall back to avformat's demux while it is not necessary.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>