[FFmpeg-soc] BFI

[Sisir Koppaka]

>From the BFI video decompression algo:

 2 : skip chain
      if length is zero, read two more bytes of the length
      if length still zero, finish the decompression
      leave (length) bytes of the output unchanged from the last frame

To leave length bytes of output unchanged i just have to *not* write
anything to those bytes, right? Or do I have write code to remember the
previous frame and all?
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Sisir Koppaka