Update list for ffdshow

ffdshow rev1281 changelog from January 16, 2008

Minor x64 fix.
Bug fix: Bug using ffdshowaudio() in ffavisynth.dll
Undo ffmpeg 8966. This should hopefully fix encoding crash on CPUs with SSE2.
updated libavcodec
Setup script : minor fix
tiny update to innosetup script
ffmpeg 9039

Older ffdshow versions:

rev1281 (Jan 16, 2008)

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