account for race condition when creating initial comp object updates tiler
account for race condition when creating initial comp object updates tiler

under wayland, some surfaces (eg. cursors) would attempt to show prior to
having acquired their actual size. these show attempts should be rejected
until the size has been set to ensure that rendering can proceed as expected

fix T2557

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