adpcm_ima_apc regression with channels count

[ami_stuff]

05.11.2012 git-c995644 - ok

14.11.2012 git-2f74f8d - bad

​http://samples.mplayerhq.hu/game-formats/yop/CIMOVI01.YOP

C:\>ffmpeg -i CIMOVI01.YOP -vn out.wav
ffmpeg version N-46755-ge70144c Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 15 2012 02:38:20 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-w32threads --enable-memalign-hack --enable-runtime-cpudetect
--enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -
lwinmm -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snap
shots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/s
napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3
--enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-
libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx
  libavutil      52.  6.100 / 52.  6.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.100 /  3. 23.100
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[adpcm_ima_apc @ 0x1fc08e0] Invalid number of channels
    Last message repeated 1 times
[yop @ 0x1edc340] max_analyze_duration 5000000 reached at 5000000
[yop @ 0x1edc340] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : 4.0
Input #0, yop, from 'CIMOVI01.YOP':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Audio: adpcm_ima_apc, 22050 Hz, 4.0, 352 kb/s
    Stream #0:1: Video: yop, pal8, 580x174, SAR 1:2 DAR 5:3, 12 fps, 12 tbr, 12
tbn, 12 tbc
Invalid sample format '(null)'
Error opening filters!

[Elon Musk]

fixed, thanks for reporting, looks like fate test is flawed.