WineD3D: shader detection improvements 2/3

[Roderick Colenbrander]

Hi,

This patch improves the ps2.0 detection when GLSL is used. For nvidia hardware we already had code using the NV_fragment_program version. Now we detect ps2.0 using the maximum number of shader instructions that can be handled in hardware. PS2.0 requires this number to be 96 and some ati/nvidia boards offer upto 512 (ps2.0b/ps2.0a).

It should result in R300/R400 ati boards to report pixel shader 2.0 instead of 3.0 which will should result in more performance. (Soon this will allow us to default to glsl)

Regards,
Roderick Colenbrander
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