Align format specifiers with source variable types.

git-svn-id: svn://daper.net/moc/trunk@2606 910807d9-36e0-0310-a014-e9ea483e2ba4
LibAV has finally fixed Opus support.

Amends: r2548
Also see: http://git.libav.org/?p=libav.git;a=commitdiff;h=ecab1c77

git-svn-id: svn://daper.net/moc/trunk@2607 910807d9-36e0-0310-a014-e9ea483e2ba4