Added a check to Irc::Session::connectSlotsByName() to prevent double connections to overridden slots.
Added a check to Irc::Session::connectSlotsByName() to prevent double connections to overridden slots.

communi/communi-symbian,communi/communi-symbian,communi/communi-desktop,communi/communi-symbian,sevanteri/communi-desktop,gdamjan/communi-desktop,jpnurmi/communi-desktop,communi/communi-desktop,communi/communi-symbian