Add/fix __UNUSED__ usage in function protos & functions.
Add/fix __UNUSED__ usage in function protos & functions.



SVN revision: 50881

rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tasn/enlightenment,tasn/enlightenment,tasn/enlightenment