o Fix FFmpeg libavcodec Buffer Overflow Vulnerability advisory:

http://secunia.com/advisories/17892/

o Patch can be found at:

http://article.gmane.org/gmane.comp.video.ffmpeg.devel/26558

o Bump PORTREVISION

Submitted by: Simon Kilvington <s.kilvington@eris.qinetiq.com> (patch)
Prompted by: marcus