support 0x350 TwoCC (Micronas speech ADPCM codec)

[ami_stuff]

it's "Micronas InterMetall Speech MI-SC4 ADPCM", decodes with noise for example with "-acodec adpcm_ct"

​http://wiki.multimedia.cx/index.php?title=Micronas_SC4

C:\>ffmpeg -i 32khz_stereo.wav
ffmpeg version N-45867-g3318d6b Copyright (c) 2000-2012 the FFmpeg developers
  built on Oct 23 2012 02:39:33 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      51. 77.100 / 51. 77.100
  libavcodec     54. 68.100 / 54. 68.100
  libavformat    54. 33.100 / 54. 33.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 20.104 /  3. 20.104
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[wav @ 0x1edbe00] Could not find codec parameters for stream 0 (Audio: none (P[3
][0][0] / 0x0350), 32000 Hz, 2 channels, 264 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[wav @ 0x1edbe00] Estimating duration from bitrate, this may be inaccurate
32khz_stereo.wav: could not find codec parameters

[Elon Musk]

Fixed in ea93943bee2efbfc44417eccdac712c5d9d677ec and e91bc521afff17a73012af153f219c3e5f3f2ce5