Put infrastructure in place so that other plugins may support dual-source blending.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6296 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX11/Src/PixelShaderCache.h

@@ -32,7 +32,7 @@ public:
 	static void Init();
 	static void Clear();
 	static void Shutdown();
-	static bool SetShader(bool dstAlpha,u32 components);
+	static bool SetShader(DSTALPHA_MODE dstAlphaMode, u32 components);
 	static bool InsertByteCode(const PIXELSHADERUID &uid, void* bytecode, unsigned int bytecodelen);
 
 	static ID3D11PixelShader* GetColorMatrixProgram();