[4/8] WineD3D: Do not try to disable unsupported texture units

[H. Verbeet]

On 27/11/2007, Stefan Dösinger <stefan at codeweavers.com> wrote:
> textures. In this case we build a texture map to read a texture from a
> lower texture unit from a higher register combiner. This texture unit
> always stays below GL_LIMITS(textures) though.
Yes, but you're checking against the sampler, not the texture unit.
Shouldn't you be checking against mapped_stage instead?