SPU2: Warning fixes for clang-cl

pcsx2/SPU2/SndOut_Cubeb.cpp

@@ -41,6 +41,7 @@ private:
 	class SampleReader
 	{
 	public:
+		virtual ~SampleReader() = default;
 		virtual void ReadSamples(void* outputBuffer, long frames) = 0;
 	};
 

pcsx2/SPU2/Windows/SndOut_XAudio2.cpp

@@ -17,13 +17,13 @@
 #include "SPU2/Global.h"
 #include "common/Console.h"
 #include "common/RedtapeWindows.h"
+#include "common/RedtapeWilCom.h"
 
 #include <memory>
 #include <sstream>
 #include <stdexcept>
 #include <string>
 
-#include <wil/com.h>
 #include <wil/resource.h>
 #include <wil/win32_helpers.h>
 #include <xaudio2.h>

pcsx2/SPU2/spu2sys.cpp

@@ -1093,6 +1093,8 @@ static __forceinline void SetLoWord(u32& src, u16 value)
 	((u16*)&src)[0] = value;
 }
 
+// Not used
+#if 0
 static __forceinline u16 GetHiWord(u32& src)
 {
 	return ((u16*)&src)[1];
@@ -1102,6 +1104,7 @@ static __forceinline u16 GetLoWord(u32& src)
 {
 	return ((u16*)&src)[0];
 }
+#endif
 
 template <int CoreIdx, int VoiceIdx, int param>
 static void RegWrite_VoiceParams(u16 value)