InstrumentTrack: made pitch range model publicly accessible

Added InstrumentTrack::pitchRangeModel() in order to allow other classes
to access pitch range model.

include/instrument_track.h

@@ -161,11 +161,6 @@ public:
 	// simple helper for removing midiport-XML-node when loading presets
 	static void removeMidiPortNode( multimediaProject & _mmp );
 
-	floatModel * pitchModel( void )
-	{
-		return &m_pitchModel;
-	}
-
 	floatModel * volumeModel( void )
 	{
 		return &m_volumeModel;
@@ -176,6 +171,16 @@ public:
 		return &m_panningModel;
 	}
 
+	floatModel * pitchModel( void )
+	{
+		return &m_pitchModel;
+	}
+
+	intModel * pitchRangeModel( void )
+	{
+		return &m_pitchRangeModel;
+	}
+
 	intModel * effectChannelModel( void )
 	{
 		return &m_effectChannelModel;