ljpg: wrong colors on bigendian

[ami_stuff]

attached vid seems to decode with wrong colors on bigendian

 http://www.datafilehost.com/download-7351e315.html

ffmpeg -i picvideo_ljpg.avi
ffmpeg version 1.1.git-05340be Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 21 2013 22:04:14 with gcc 4.5.0 (GCC)
  libavutil      52. 15.100 / 52. 15.100
  libavcodec     54. 90.100 / 54. 90.100
  libavformat    54. 61.102 / 54. 61.102
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 33.100 /  3. 33.100
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, avi, from 'picvideo_ljpg.avi':
  Duration: 00:00:12.64, start: 0.000000, bitrate: 15215 kb/s
    Stream #0:0: Video: mjpeg (JPGL / 0x4C47504A), bgr24, 320x240, 23.97 tbr, 23.97 tbn, 23.97 tbc
At least one output file must be specified