wined3d: Regression in DX8 SDK samples with VBO patch

[Jason Green]

http://source.winehq.org/git/?p=wine.git;a=commit;h=2122026713baa318093181607db79d7577f728e9

This patch breaks most of the DirectX 8 SDK Direct3D samples
(Billboard, ClipMirror, Cull, etc.).  It seems like most of the
samples that use Shaders work fine, but those that don't are broken
(misplaced vertices, etc.).