RE: [1/8] [d3d8] validate pool type in CreateVolumeTexture

[Stefan Dösinger]

> - if ((DWORD)(Pool) >= 4) {
> -
>    ERR("(%p) Called with invalid pool type\n", This);
> -
>    return D3DERR_INVALIDCALL;
> - }

You could use if(Pool != D3DPOOL_DEFAULT && Pool != MANAGED ...) instead
of comparing to the arbitary value "4". The compiler should figure that out and generate a >= 4 for better efficiency, but even if not it doesn't hurt because Create* isn't performance critical.