[FFmpeg-user] Determined to not find libvpx

[Andoru]

> > I've checked the log and there is indeed 
> > ~/ffmpeg_build/includes/vpx/vpx-decoder.h and all the other include files,
> > so I have no idea what went wrong.
> 
> > --extra-cflags=-I/home/andoru/ffmpeg/include
> 
> This appears to be missing an 's' if the path in your email is correct.

My bad, I meant ~/ffmpeg_build/include/vpx/vpx-decoder.h
I double-checked, the path is correct.