some work on zscale and zoffset, don't know if this is correct but at least it seem to fix one or two games.

thanks a lot to chaoscode he make possible to test this on nvidia. please test this a lot and give me feedback :)

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4468 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/PixelShaderManager.h

@@ -54,6 +54,8 @@ public:
 	static void SetFogParamChanged();
 	static void SetColorMatrix(const float* pmatrix, const float* pfConstAdd);
 	static u32 GetTextureMask();
+	static void SetZScale(float data);
+	static void SetZOffset(float data);
 };