zzuf .avi hangs FFMPEG

[Oana Stratulat]

==2217== Memcheck, a memory error detector
==2217== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==2217== Using Valgrind-3.6.1-Debian and LibVEX; rerun with -h for copyright info
==2217== Command: ffmpeg -i corruptfile -f null -
==2217==
ffmpeg version N-35936-gaf3f2a8, Copyright (c) 2000-2011 the FFmpeg developers

built on Dec 19 2011 00:07:16 with gcc 4.6.1
configuration:
libavutil 51. 32. 0 / 51. 32. 0
libavcodec 53. 46. 0 / 53. 46. 0
libavformat 53. 26. 0 / 53. 26. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 53. 0 / 2. 53. 0
libswscale 2. 1. 0 / 2. 1. 0

==2217==
==2217== HEAP SUMMARY:
==2217== in use at exit: 83,622 bytes in 12 blocks
==2217== total heap usage: 25 allocs, 13 frees, 122,158 bytes allocated
==2217==
==2217== LEAK SUMMARY:
==2217== definitely lost: 0 bytes in 0 blocks
==2217== indirectly lost: 0 bytes in 0 blocks
==2217== possibly lost: 0 bytes in 0 blocks
==2217== still reachable: 83,622 bytes in 12 blocks
==2217== suppressed: 0 bytes in 0 blocks
==2217== Rerun with --leak-check=full to see details of leaked memory
==2217==
==2217== For counts of detected and suppressed errors, rerun with: -v
==2217== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 4)