problem with pcx 1bpp file

[ami_stuff]

attached file decodes to black screen
(decodes fine with irfanview/imagemagick)

C:\>ffmpeg -i 1bpp.pcx
ffmpeg version N-34549-g13b7781, Copyright (c) 2000-2011 the FFmpeg developers
  built on Nov  6 2011 22:02:08 with gcc 4.6.1
  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. 24. 0 / 51. 24. 0
  libavcodec   53. 28. 0 / 53. 28. 0
  libavformat  53. 19. 0 / 53. 19. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 47. 0 /  2. 47. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
Input #0, image2, from '1bpp.pcx':
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: pcx, pal8, 1023x767, 25 tbr, 25 tbn, 25 tbc
At least one output file must be specified

[Carl Eugen Hoyos]

The palette is all 0 for 1bit pcx and either has to be set to the correct values (black - white), or pix_fmt changed to MONO_WHITE and decoding changed accordingly.

Simple patch sent to ffmpeg-devel.