elm genlist: Refactoring. Create spacer object only when it is needed.
elm genlist: Refactoring. Create spacer object only when it is needed.

SVN revision: 69518

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