wined3d: Correctly display fog for right-handed projection matrix (try 7)

[Henri Verbeet]

On 12 October 2014 17:24, Stefan Dösinger <stefandoesinger at gmail.com> wrote:
> In either case that's no reason to hold up this patch any longer IMHO.
>
But the tests still fail to distinguish between taking the absolute of
ec_pos.z in shader_glsl_generate_ffp_vertex_shader() and taking the
absolute of gl_FogFragCoord in shader_glsl_generate_fog_code(), of
course.