Setting up a package to use gtk-doc

[rsteinke w-link net]

	I'm setting up a package to use gtk-doc, and it went fine except
for two problems:

1. The sample Makefile.am provides a commented-out DOC_OVERRIDES option.
This is well and good, but if it's not defined you get an error. You
need to add an uncommented line

DOC_OVERRIDES =

to get it to work by default.

2. If you don't have any functions in sections.txt, you get a
divide-by-zero error at line 1763 of gtkdoc-mkdb when it tries to
compute the percentage of functions documented. This isn't a serious
problem, but makes the initial setup a little disconcerting.

Ron Steinke