wined3d: Use a wined3d_resource operation to retrieve the resource dimensions in wined3d_device_context_update_sub_resource().
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>