win ico: only part of the image is displayed (ffplay)

[ami_stuff]

decodes correctly with ffmpeg

C:\>ffplay 1.ico
ffplay version N-35709-g7d531e8, Copyright (c) 2003-2011 the FFmpeg developers
  built on Dec 12 2011 13:50:00 with gcc 4.6.2
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
-enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
libxvid --enable-zlib
  libavutil    51. 32. 0 / 51. 32. 0
  libavcodec   53. 43. 0 / 53. 43. 0
  libavformat  53. 24. 0 / 53. 24. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 53. 0 /  2. 53. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[ico @ 020CA0E0] Estimating duration from bitrate, this may be inaccurate
Input #0, ico, from '1.ico':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: bmp, bgr24, 640x330, 90k tbr, 90k tbn, 90k tbc
[buffersink @ 020D2BC0] auto-inserting filter 'auto-inserted scale 0' between th
e filter 'src' and the filter 'out'
[scale @ 020D2120] w:128 h:74 fmt:bgr24 -> w:128 h:74 fmt:yuv420p flags:0x4
Frame changed from size:128x74 to size:640x330
[buffersink @ 020D3280] auto-inserting filter 'auto-inserted scale 1' between th
e filter 'src' and the filter 'out'
[scale @ 020D3C40] w:640 h:330 fmt:bgr24 -> w:640 h:330 fmt:yuv420p flags:0x4
   1.22 A-V:  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0

[cehoyos]

Fixed by Peter Ross.