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/XFMemory.h

@@ -228,6 +228,8 @@ struct XFRegisters
     bool bEnableDualTexTransform;
 	float rawViewport[6];
 	float rawProjection[7];
+	float ZScale;
+	float Zoffset;
 };