[4] [wined3d] trigger constant reloading when RECT textures change

[Henri Verbeet]

2009/3/23 Tobias Jakobi <Liquid.Acid at gmx.net>:
> +        if (!use_ps(stateblock) || (stateblock->wineD3DDevice->shader_backend != &glsl_shader_backend)) {

Checking which backend is used is pretty ugly.