Corrected names of GetXFBAddress* functions in header.

They were named incorrectly in VideoInterface.h, but because nobody used
them outside of VideoInterface.cpp where they were decleared until now, this
hasn't been an issue.

Source/Core/Core/Src/HW/VideoInterface.h

@@ -333,8 +333,8 @@ union UVIDTVStatus
 	void Write32(const u32 _uValue, const u32 _uAddress);
 
 	// returns a pointer to the current visible xfb
-	u8* GetXFBPointerTop();
-	u8* GetXFBPointerBottom();
+	u32 GetXFBAddressTop();
+	u32 GetXFBAddressBottom();
 
 	// Update and draw framebuffer
 	void Update();