cscd gzip: video with width not multiple of 4 fails to decode

[ami_stuff]

"cscd_1_0_306_306_gzip.avi" file was encoded by the "CamStudio Lossless Codec 1.0" and does not decode since 6de039823c2ffcf88e8bfff0d4e3ed9d5601a122

./ffmpeg -i cscd_1_0_306_306_gzip.avi -y out.avi
ffmpeg version N-109867-g5247dab6b1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: 
  libavutil      58.  1.100 / 58.  1.100
  libavcodec     60.  2.100 / 60.  2.100
  libavformat    60.  2.100 / 60.  2.100
  libavdevice    60.  0.100 / 60.  0.100
  libavfilter     9.  1.100 /  9.  1.100
  libswscale      7.  0.100 /  7.  0.100
  libswresample   4.  9.100 /  4.  9.100
Input #0, avi, from 'cscd_1_0_306_306_gzip.avi':
  Metadata:
    software        : Lavf60.2.100
  Duration: 00:00:00.21, start: 0.000000, bitrate: 30031 kb/s
  Stream #0:0: Video: cscd (CSCD / 0x44435343), bgr24, 306x306, 23.97 fps, 23.97 tbr, 23.97 tbn
Stream mapping:
  Stream #0:0 -> #0:0 (cscd (camstudio) -> mpeg4 (native))
Press [q] to stop, [?] for help
[camstudio @ 0x55cd0010fb80] error during zlib decompression
Error while decoding stream #0:0: Invalid data found when processing input
[camstudio @ 0x55cd0010fb80] error during zlib decompression
Error while decoding stream #0:0: Invalid data found when processing input
[camstudio @ 0x55cd0010fb80] error during zlib decompression
Error while decoding stream #0:0: Invalid data found when processing input
[camstudio @ 0x55cd0010fb80] error during zlib decompression
Error while decoding stream #0:0: Invalid data found when processing input
[camstudio @ 0x55cd0010fb80] error during zlib decompression
Error while decoding stream #0:0: Invalid data found when processing input
Output #0, avi, to 'out.avi':
  Metadata:
    software        : Lavf60.2.100
    ISFT            : Lavf60.2.100
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 306x306, q=2-31, 200 kb/s, 23.97 fps, 23.97 tbn
    Metadata:
      encoder         : Lavc60.2.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbframe=    0 fps=0.0 q=0.0 Lsize=       6kB time=-577014:32:22.77 bitrate=N/A speed=N/A    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
Conversion failed!

[Michael Niedermayer]

Fixed in ab7d38f970674e6765b5e1adb911c1763b9ce806