elm_win: Removed EE_ENGINE_COMPARE macro to reduce redundant function calls.
elm_win: Removed EE_ENGINE_COMPARE macro to reduce redundant function calls.

EE_ENGINE_COMPARE reduces typing little bit, but it makes redundant function calls
because almost callers call it more than once.
And, there is no way to check whether ecore_evas_engine_name_get is null.

This patch removed EE_ENGINE_COMPARE with small refactoring.
In addition, removed unnecessary check routines from _elm_ee_xwin_get.

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