world/gnome-internet-radio-locator.bst: Add missing gtk-doc dependency
checking for gtk-doc >= 1.9...
testing gtkdocize... not found.
***Error***: You must have gtk-doc >= 1.9 installed
to build gnome-internet-radio-locator. Download the appropriate package for
from your distribution or get the source tarball at
http://ftp.gnome.org/pub/GNOME/sources/gtk-doc/
Edited by Jürg Billeter