Fixed the signals in the gtk-doc documentation generation

[Philip Van Hoof <spam pvanhoof be>]

I finally fixed the signals in the gtk-doc documentation generation.

A bug on gtk-doc has been opened here:

http://bugzilla.gnome.org/show_bug.cgi?id=355352

-- 
Philip Van Hoof, software developer at x-tend 
home: me at pvanhoof dot be 
gnome: pvanhoof at gnome dot org 
work: vanhoof at x-tend dot be 
http://www.pvanhoof.be - http://www.x-tend.be