ape: add support for 32-bit integer

[ami_stuff]

./ffmpeg -i 32.ape
ffmpeg version N-112010-g1a87a9d82a Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: 
  libavutil      58. 19.100 / 58. 19.100
  libavcodec     60. 26.100 / 60. 26.100
  libavformat    60. 11.100 / 60. 11.100
  libavdevice    60.  2.101 / 60.  2.101
  libavfilter     9. 11.100 /  9. 11.100
  libswscale      7.  3.100 /  7.  3.100
  libswresample   4. 11.100 /  4. 11.100
[ape @ 0x558e56913840] 32 bits per coded sample is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ape @ 0x558e56913840] If you want to help, upload a sample of this file to https://streams.videolan.org/upload/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
[ape @ 0x558e56912580] Failed to open codec in avformat_find_stream_info
[ape @ 0x558e56913840] 32 bits per coded sample is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ape @ 0x558e56913840] If you want to help, upload a sample of this file to https://streams.videolan.org/upload/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
[ape @ 0x558e56913840] 32 bits per coded sample is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ape @ 0x558e56913840] If you want to help, upload a sample of this file to https://streams.videolan.org/upload/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
[ape @ 0x558e56912580] Failed to open codec in avformat_find_stream_info
[ape @ 0x558e56912580] Could not find codec parameters for stream 0 (Audio: ape (APE  / 0x20455041), 48000 Hz, 0 channels (32 bit)): unspecified number of channels
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[aist#0:0/ape @ 0x558e56916c40] Guessed Channel Layout: stereo
Input #0, ape, from '32.ape':
  Duration: 00:00:06.76, start: 0.000000, bitrate: 1326 kb/s
  Stream #0:0: Audio: ape (APE  / 0x20455041), 48000 Hz, 2 channels (32 bit)
At least one output file must be specified