Small Gtk2::api documentation fix

["A. Pagaltzis" <pagaltzis gmx de>]

Hi all,

as per http://www.perlmonks.org/index.pl?node_id=389158, here's a
small patch that substitutes "Glib::IOChannel" in the Gtk2::api
POD for the correct "Glib::IO".

Regards,
-- 
Aristotle
"If you can't laugh at yourself, you don't take life seriously enough."

Attachment: api.pod.patch
Description: Text document