the bug that ate make distcheck

[Luis Villa <luis villa gmail com>]

'make distcheck' actually seems to work shockingly well (enough that
I'll probably try to run it once a day) but this bug:

Libwnck CVS HEAD fails to compile w/ --enable-gtk-doc
http://bugzilla.gnome.org/show_bug.cgi?id=302231

hoses things pretty badly, since libwnck is (indirectly) a dependency
for 'make check' for lots of things, including nautilus, and
--enable-gtk-doc is required for make distcheck.

If someone with lots of autofoo could take a look at this bug and fix
it, it would be much appreciated. Thanks-
Luis