[MPlayer-dev-eng] [PATCH] change demux_mov.c to use stream_skip instead of stream_seek

[elupus]

Hi,

This patch changes demux_mov.c to use stream_skip's instead of stream_seeks 
to move about in stream, this makes it abit more robust on http streams 
where server doesn't support seeks. Using stream_seek instead could make 
demuxer crash when cache was low, as that would then force it to attempt a 
seek.

It also makes sure demuxer checks return value of the seek commands and 
bails out if it fails. demuxer would end up in a broken loop

One thing to note could be that this might make it a tiny bit slower on 
filesystems where seeks are very inexpensive and the mov files is read in 
some odd non linear faction, but reading 2*STREAM_BUFFER_SIZE on those 
filesystems probably won't be much slower.

/Joakim

PS. This patch relies on the fix for stream_skip for it to work
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