wvc1 interlaced decodes incorrectly

[ami_stuff]

attached file (encoded with "windows media encoder 8") is decoded incorrectly by ffmpeg

​http://www1.datafilehost.com/d/beee27be

C:\>ffmpeg -i interlaced_top.wmv -an out.avi
ffmpeg version N-52725-ge756635 Copyright (c) 2000-2013 the FFmpeg developers
  built on May  4 2013 02:45:38 with gcc 4.5.0 (GCC) 20100414 (Fedora MinGW 4.5.
0-1.fc14)
  configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build --arch=
x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686-pc-min
gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime-cpudetect
--enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -
lwinmm -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snap
shots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/s
napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3
--enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-
libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx
  libavutil      52. 28.100 / 52. 28.100
  libavcodec     55.  7.100 / 55.  7.100
  libavformat    55.  4.101 / 55.  4.101
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 63.101 /  3. 63.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[asf @ 0x1fbf920] max_analyze_duration 5000000 reached at 5070000 microseconds
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, asf, from 'interlaced_top.wmv':
  Metadata:
    WMFSDKVersion   : 11.0.5721.5275
    WMFSDKNeeded    : 0.0.0.0000
    Buffer Average  : 1521
    VBR Peak        : 757702
    IsVBR           : 1
    DeviceConformanceTemplate: AP@L3
  Duration: 00:00:12.67, start: 0.026000, bitrate: 1072 kb/s
    Stream #0:0(pol): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp
, 281 kb/s
    Stream #0:1(pol): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 320x24
0, 914 kb/s, 23.98 tbr, 1k tbn, 1k tbc
Output #0, avi, to 'out.avi':
  Metadata:
    WMFSDKVersion   : 11.0.5721.5275
    WMFSDKNeeded    : 0.0.0.0000
    Buffer Average  : 1521
    VBR Peak        : 757702
    IsVBR           : 1
    DeviceConformanceTemplate: AP@L3
    ISFT            : Lavf55.4.101
    Stream #0:0(pol): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240, q=2-31
, 200 kb/s, 23.98 tbn, 23.98 tbc
Stream mapping:
  Stream #0:1 -> #0:0 (vc1 -> mpeg4)
Press [q] to stop, [?] for help
frame=  109 fps=0.0 q=9.0 size=     210kB time=00:00:04.54 bitrate= 378.8kbits/s
frame=  212 fps=0.0 q=13.1 size=     354kB time=00:00:08.84 bitrate= 328.0kbits/
frame=  303 fps=220 q=10.2 Lsize=     453kB time=00:00:12.63 bitrate= 293.7kbits
/s
video:440kB audio:0kB subtitle:0 global headers:0kB muxing overhead 2.906442%

[Michael Niedermayer]

Fixed in 017e234c204f8ffb5f85a073231247881be1ac6f