Bug#818037: vorbis-tools: vcut always(?) segfaults

[Frank Heckenbach]

> It's not yet in the upstream git repository (I submitted the patch
> through their bug tracker, but someone from upstream has to check it and 
> apply it), but in our (the Debian package's) git repository.
> 
> You can find the patch here:
> 
> https://anonscm.debian.org/cgit/pkg-xiph/vorbis-tools.git/tree/debian/patches/Fix-segfault-in-vcut.patch

Seems to work for me. Thanks.

Frank