fix stale INPUTMAN pointer in Lua after device change

stepmania/src/GameLoop.cpp

@@ -100,8 +100,7 @@ void GameLoop()
 
 		if( INPUTMAN->DevicesChanged() )
 		{
-			SAFE_DELETE( INPUTMAN );
-			INPUTMAN	= new RageInput( PREFSMAN->GetInputDrivers() );
+			INPUTMAN->LoadDrivers();
 			StepMania::CheckForChangedInputDevicesAndRemap();
 		}
 

stepmania/src/RageInput.cpp

@@ -12,12 +12,9 @@ RageInput::RageInput( CString sDriverList )
 {
 	LOG->Trace( "RageInput::RageInput()" );
 
-	/* Init optional devices. */
-	MakeInputHandlers( sDriverList, m_pDevices );
+	m_sDriverList = sDriverList;
 
-	/* If no input devices are loaded, the user won't be able to input anything. */
-	if( m_pDevices.size() == 0 )
-		LOG->Warn( "No input devices were loaded." );
+	LoadDrivers();
 }
 
 RageInput::~RageInput()
@@ -27,6 +24,20 @@ RageInput::~RageInput()
 		delete m_pDevices[i];
 }
 
+void RageInput::LoadDrivers()
+{
+	for( unsigned i = 0; i < m_pDevices.size(); ++i )
+		delete m_pDevices[i];
+	m_pDevices.clear();
+
+	/* Init optional devices. */
+	MakeInputHandlers( m_sDriverList, m_pDevices );
+
+	/* If no input devices are loaded, the user won't be able to input anything. */
+	if( m_pDevices.size() == 0 )
+		LOG->Warn( "No input devices were loaded." );
+}
+
 void RageInput::Update( float fDeltaTime )
 {
 	/* Update optional devices. */

stepmania/src/RageInput.h

@@ -14,6 +14,7 @@ public:
 	RageInput( CString sDriverList );
 	~RageInput();
 
+	void LoadDrivers();
 	void Update( float fDeltaTime );
 	bool DevicesChanged();
 	void GetDevicesAndDescriptions( vector<InputDevice>& vDevicesOut, vector<CString>& vsDescriptionsOut );
@@ -27,6 +28,7 @@ public:
 
 private:
 	vector<InputHandler *> m_pDevices;
+	CString m_sDriverList;
 };
 
 extern RageInput*			INPUTMAN;	// global and accessable from anywhere in our program