Add dummy item where UncapFramerate used to sit, add note to explain why

src/common/Settings.hpp

@@ -204,9 +204,13 @@ public:
         unsigned int XboxPortMapHostPort[XBCTRL_MAX_GAMEPAD_PORTS] = { 0, 1, 2, 3 };
 	} m_controller_port;
 
-	// Hack settings
+	// Hack settings
+	// NOTE: When removing fields, replace them with place-holders
+	// The size and order of this structure should *not* be allowed to change
+	// TODO: Fix IPC/Shared Memory so this isn't necessary
 	struct s_hack {
-		bool DisablePixelShaders;
+		bool DisablePixelShaders;
+		bool Reserved2;
 		bool UseAllCores;
 		bool SkipRdtscPatching;
 		bool ScaleViewport;