[MPlayer-dev-eng] [PATCH] Fixes a segfault in mkv demuxer with non seekable files and -ss, -idx options

[Francesco Cosoleto]

Hi,

When an index mode option and a seek request to given time position are
specified on the command line and no index was found in the file (e.g.
mplayer -idx -ss 1 samples.mplayerhq.hu/Matroska/x264_no-b-frames.mkv),
then mkv demuxer crash in demux_mkv_seek():

2938     max_pos = mkv_d->cluster_positions[mkv_d->num_cluster_pos-1];

Attached a possible (acceptable?) solution for the problem.

-- 
Francesco Cosoleto | http://cosoleto.free.fr

I have made this letter longer than usual because I lack the time to 
make it shorter. (Blaise Pascal)
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