zlib: rgb24 file fails do decode when width is not multiple of 4

[ami_stuff]

attached file decodes correctly in VirtualDub + avizlib codec

the output should be identical to:

​https://trac.ffmpeg.org/raw-attachment/ticket/10235/mszh_306_306_rgb24_nocompress.avi

./ffmpeg -i zlib_306_306_rgb24.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 'zlib_306_306_rgb24.avi':
  Metadata:
    software        : Lavf60.2.100
  Duration: 00:00:00.33, start: 0.000000, bitrate: 37668 kb/s
  Stream #0:0: Video: zlib (ZLIB / 0x42494C5A), bgr24, 306x306, 23.97 fps, 23.97 tbr, 23.97 tbn
Stream mapping:
  Stream #0:0 -> #0:0 (zlib (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
[zlib @ 0x55a51668b8c0] Inflate error: -5
Error while decoding stream #0:0: Unknown error occurred
[zlib @ 0x55a5166d3840] Inflate error: -5
[zlib @ 0x55a51671b880] Inflate error: -5
[zlib @ 0x55a5167638c0] Inflate error: -5
[zlib @ 0x55a5167ab900] Inflate error: -5
[zlib @ 0x55a5167f3940] Inflate error: -5
Error while decoding stream #0:0: Unknown error occurred
    Last message repeated 4 times
[zlib @ 0x55a51683b980] Inflate error: -5
Error while decoding stream #0:0: Unknown error occurred
[zlib @ 0x55a5168839c0] Inflate error: -5
Error while decoding stream #0:0: Unknown error occurred
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!

[Elon Musk]

Fixed in e2c3aa8e2b800c5b860315277b3ea426b8b23393