Mesa drivers require at least 3 images (see Mesa commit
4689e98fe884d9412b72fd6293b6d6a69e3ef68e).
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>