this is a pure optimization commit:

return to the  old values in constants in pixelshader, the old values give mi 3 or 4 fps more,(maybe some kind of compiler optimization) in some games and with the current algorithm i notice no difference with this values, please report any problem.
optimizes SSAA to make it a little faster and, the quality should be the same but with a little speedup.
change the way the frame is processed depending is xfb is enabled or not to make this a little faster.
please test and report any problem

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5820 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX9/Src/FramebufferManager.cpp

@@ -332,7 +332,6 @@ void FramebufferManager::copyToVirtualXFB(u32 xfbAddr, u32 fbWidth, u32 fbHeight
 		--it;
 	}
 
-	float SuperSampleCompensation = 1.0f;
 	float scaleX = Renderer::GetXFBScaleX();
 	float scaleY = Renderer::GetXFBScaleY();
 	TargetRectangle targetSource,efbSource;