g2m4: trashed mouse pointer

[ami_stuff]

when you decode attached file with git head then mouse pointer from the video will look trashed

it decoded ok at least with gb4e1630

​http://www1.datafilehost.com/d/f25241dc

C:\>ffmpeg -i g2m4_pointer.wmv -an out.avi
ffmpeg version N-56297-g7ac6c63 Copyright (c) 2000-2013 the FFmpeg developers
  built on Sep 15 2013 18:02:28 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 43.100 / 52. 43.100
  libavcodec     55. 31.101 / 55. 31.101
  libavformat    55. 16.102 / 55. 16.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 84.100 /  3. 84.100
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, asf, from 'g2m4_pointer.wmv':
  Metadata:
    DeviceConformanceTemplate: L2
    WMFSDKNeeded    : 0.0.0.0000
    WMFSDKVersion   : 12.0.7601.17514
    IsVBR           : 1
    WM/ToolVersion  : 5.1 Build 880
    WM/ToolName     : GoToMeeting
    BitRateFrom the writer: 492407
    Audio samples   : 29959
    Video samples   : 25936
    recording time  : Thu, 05 Apr 2012 14:03:20 Eastern Daylight Time
    encoder         : Lavf55.16.102
  Duration: 00:00:09.87, start: 0.000000, bitrate: 506 kb/s
    Stream #0:0: Video: g2m (G2M4 / 0x344D3247), rgb24, 1024x768, 9.92 tbr, 1k t
bn, 1k tbc
Output #0, avi, to 'out.avi':
  Metadata:
    DeviceConformanceTemplate: L2
    WMFSDKNeeded    : 0.0.0.0000
    WMFSDKVersion   : 12.0.7601.17514
    IsVBR           : 1
    WM/ToolVersion  : 5.1 Build 880
    WM/ToolName     : GoToMeeting
    BitRateFrom the writer: 492407
    Audio samples   : 29959
    Video samples   : 25936
    recording time  : Thu, 05 Apr 2012 14:03:20 Eastern Daylight Time
    ISFT            : Lavf55.16.102
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1024x768, q=2-31, 20
0 kb/s, 9.92 tbn, 9.92 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (g2m -> mpeg4)
Press [q] to stop, [?] for help
frame=   56 fps=0.0 q=22.2 size=     623kB time=00:00:06.05 bitrate= 843.1kbits/
frame=   88 fps=0.0 q=31.0 Lsize=     721kB time=00:00:09.88 bitrate= 597.8kbits
/s dup=0 drop=67
video:713kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.104291%

decodes ok with (have no ffmpeg bin at hand):

C:\>ffplay g2m4_pointer.wmv
ffplay version N-56125-gb4e1630 Copyright (c) 2003-2013 the FFmpeg developers
  built on Sep  9 2013 01:40:33 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 43.100 / 52. 43.100
  libavcodec     55. 31.101 / 55. 31.101
  libavformat    55. 16.101 / 55. 16.101
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 84.100 /  3. 84.100
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, asf, from 'g2m4_pointer.wmv':    0KB sq=    0B f=0/0
  Metadata:
    DeviceConformanceTemplate: L2
    WMFSDKNeeded    : 0.0.0.0000
    WMFSDKVersion   : 12.0.7601.17514
    IsVBR           : 1
    WM/ToolVersion  : 5.1 Build 880
    WM/ToolName     : GoToMeeting
    BitRateFrom the writer: 492407
    Audio samples   : 29959
    Video samples   : 25936
    recording time  : Thu, 05 Apr 2012 14:03:20 Eastern Daylight Time
    encoder         : Lavf55.16.102
  Duration: 00:00:09.87, start: 0.000000, bitrate: 506 kb/s f=0/0
    Stream #0:0: Video: g2m (G2M4 / 0x344D3247), rgb24, 1024x768, 9.92 tbr, 1k t
bn, 1k tbc
   8.45 M-V: -0.016 fd=  56 aq=    0KB vq=    0KB sq=    0B f=0/0

[Carl Eugen Hoyos]

Regression since fa9e8ba

[Michael Niedermayer]

Fixed in c88ac1e0233f34582312dc617261b9270b61df19