Core: Get rid of the void handle parameter for DSP initialization

Source/Core/Core/DSPEmulator.h

@@ -13,7 +13,7 @@ public:
 
 	virtual bool IsLLE() = 0;
 
-	virtual bool Initialize(void *hWnd, bool bWii, bool bDSPThread) = 0;
+	virtual bool Initialize(bool bWii, bool bDSPThread) = 0;
 	virtual void Shutdown() = 0;
 
 	virtual void DoState(PointerWrap &p) = 0;