This results in a valid format instead of NULL being returned for
buffers and any other case where DXGI_FORMAT_UNKNOWN is specified.
In some cases invalid use of a buffer or DXGI_FORMAT_UNKNOWN will
not result in E_INVALIDARG, and would need to be tested explicitly
if proven to be an issue.
Signed-off-by: Conor McCarthy <cmccarthy@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>