lead: broken output

[ami_stuff]

decodes correctly with the original codec

./ffmpeg -i lead_broken_output.avi -y out.avi
ffmpeg version N-112728-g409b29d3f9 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: 
  libavutil      58. 32.100 / 58. 32.100
  libavcodec     60. 33.100 / 60. 33.100
  libavformat    60. 17.100 / 60. 17.100
  libavdevice    60.  4.100 / 60.  4.100
  libavfilter     9. 13.100 /  9. 13.100
  libswscale      7.  6.100 /  7.  6.100
  libswresample   4. 13.100 /  4. 13.100
Input #0, avi, from 'lead_broken_output.avi':
  Duration: 00:00:00.12, start: 0.000000, bitrate: 2388 kb/s
  Stream #0:0: Video: lead (LEAD / 0x4441454C), yuv420p, 524x524, 25 fps, 25 tbr, 25 tbn
Stream mapping:
  Stream #0:0 -> #0:0 (lead (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf60.17.100
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(progressive), 524x524, q=2-31, 200 kb/s, 25 fps, 25 tbn
    Metadata:
      encoder         : Lavc60.33.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=5.7 size=       0kB time=00:00:00.00 bitrate=N/A speed=N/A[out#0/avi @ 0x5624b1c7f700] video:83kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.737000%
frame=    3 fps=0.0 q=2.0 Lsize=      89kB time=00:00:00.08 bitrate=9125.8kbits/s speed=4.61x    

[pross]

Fixed in db975ff00d2111de8052abfd65bd250a737bec6d.