elm_widget: Pass Elm_Object_Item *item as *event_info in item->del_func.
elm_widget: Pass Elm_Object_Item *item as *event_info in item->del_func.

Summary:
Pass Elm_Object_Item *item instead of Elm_Widget_Item_Data *item as
         *event_info in item->del_func to let *event_info be used.
         @fix

Reviewers: Hermet

Differential Revision: https://phab.enlightenment.org/D1788

rvandegrift/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,rvandegrift/elementary,tasn/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,tasn/elementary,rvandegrift/elementary