Note that "byte_count" is 4 for R10G10B10X2_UINT/R10G10B10X2_SNORM, while
"attribute_size" is 6. I think 4 is correct.
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>