D3D: Eliminate black borders, add 4:3 and 16:9 settings, and the widescreen hack. Unfortunately this temporarily breaks MSAA (in d3d only) until I have time to fix it.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4263 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX9/Src/PixelShaderCache.h

@@ -44,6 +44,7 @@ private:
 		{
 			if (shader)
 				shader->Release();
+			shader = NULL;
 		}
 	};
 
@@ -55,6 +56,7 @@ private:
 public:
 	static void Init();
 	static void Cleanup();
+	static void Clear();
 	static void Shutdown();
 	static bool SetShader(bool dstAlpha);
 #if defined(_DEBUG) || defined(DEBUGFAST)