Allow the archhooks to update if needed once per cycle through game loop. This is done after inputs have been handled

stepmania/src/StepMania.cpp

@@ -811,6 +811,8 @@ static void GameLoop()
 		/* Important:  Process input AFTER updating game logic, or input will be acting on song beat from last frame */
 		HandleInputEvents( fDeltaTime );
 
+		HOOKS->Update( fDeltaTime );
+
 		/*
 		 * Render
 		 */

stepmania/src/arch/ArchHooks/ArchHooks.h

@@ -40,6 +40,8 @@ public:
 	virtual MessageBoxResult MessageBoxAbortRetryIgnore( CString sMessage, CString ID = "" ) { return ignore; } 
 
 	virtual ~ArchHooks() { }
+	/* This is called once each time through the game loop */
+	virtual void Update(float delta) { }
 };
 
 #endif