IFF PBM fails to decode

[ami_stuff]

attached IFF PBM file stopped decoding corectly somewhere between release 2.1 and 2.2.1

ffmpeg 2.2.1 (10-Apr-2014) - fails
ffmpeg 2.1 (30-Oct-2013) - decodes ok

C:\>ffmpeg -i 6251.LBM out.bmp
ffmpeg version N-80043-g1499242 Copyright (c) 2000-2016 the FFmpeg developers
  built 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-pthreads --enable-memalign-hack --enable-runtime-cpudetect --
enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -lw
inmm -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snapsh
ots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/sna
pshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3 --
enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-li
bvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-li
bopencore-amrwb --enable-libmp3lame --enable-libfreetype --enable-libvpx --disab
le-decoder=libvpx
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 42.100 / 57. 42.100
  libavformat    57. 36.100 / 57. 36.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.100 /  6. 46.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, iff, from '6251.LBM':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: iff_ilbm (PBM  / 0x204D4250), pal8, 625x468, SAR 1:1 DAR
 625:468, 90k tbr, 90k tbn
[image2 @ 0x2c99a60] Frame rate very high for a muxer not efficiently supporting
 it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[image2 @ 0x2c99a60] Using AVStream.codec to pass codec parameters to muxers is
deprecated, use AVStream.codecpar instead.
Output #0, image2, to 'out.bmp':
  Metadata:
    encoder         : Lavf57.36.100
    Stream #0:0: Video: bmp, pal8, 625x468 [SAR 1:1 DAR 625:468], q=2-31, 200 kb
/s, 90k fps, 90k tbn
    Metadata:
      encoder         : Lavc57.42.100 bmp
Stream mapping:
  Stream #0:0 -> #0:0 (iff_ilbm (iff) -> bmp (native))
Press [q] to stop, [?] for help
frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=0.000704
x
video:288kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing o
verhead: unknown

[ami_stuff]

Regression since 4843227b2ca6876d07caddddd62e58e52d67e94f.

[Michael Niedermayer]

Fixed in c3ad63c6a3d5ea3497682e9581388f9481c34451