wined3d: Introduce wined3d_rendertarget_view_get_drawable_size() as replacement for surface_get_drawable_size().
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>