Merge commit '4fd7e63c'

* commit '4fd7e63c':
  mp3: Tweak the probe scores

Conflicts:
	libavformat/mp3dec.c

FFmpeg detects the file fine, and there is a non zero risk
that this change may lead to misdetections, thus not merged.
If someone has a mp3 file that is misdetected, please open a ticket
Merged-by: Michael Niedermayer <michaelni@gmx.at>