Return to compilable state (.h still breaks arch.o however)

stepmania/src/arch/LowLevelWindow/LowLevelWindow_X11.cpp

@@ -4,6 +4,7 @@
 #include "RageException.h"
 #include "archutils/Unix/X11Helper.h"
 #include "PrefsManager.h" // XXX
+#include "RageDisplay.h" // VideoModeParams
 
 #include <stack>
 #include <math.h>	// ceil()

stepmania/src/arch/LowLevelWindow/LowLevelWindow_X11.h

@@ -3,6 +3,7 @@
 #ifndef LOW_LEVEL_WINDOW_X11_H
 #define LOW_LEVEL_WINDOW_X11_H
 
+#include "RageDisplay.h" // VideoModeParams
 #include "LowLevelWindow.h"
 
 class LowLevelWindow_X11 : public LowLevelWindow
@@ -12,7 +13,7 @@ public:
 	~LowLevelWindow_X11();
 
 	void *GetProcAddress(CString s);
-	CString TryVideoMode(VideoModeParams p, bool &bNewDeviceOut);
+	CString TryVideoMode(const VideoModeParams &p, bool &bNewDeviceOut);
 	bool IsSoftwareRenderer( CString &sError );
 	void SwapBuffers();