Treat all tracks counters as unsigned.

src/GUI/AbstractGraphicsMediaItem.cpp

@@ -43,7 +43,7 @@ void AbstractGraphicsMediaItem::mouseReleaseEvent( QGraphicsSceneMouseEvent* )
     setCursor( Qt::OpenHandCursor );
 }
 
-int AbstractGraphicsMediaItem::trackNumber()
+quint32 AbstractGraphicsMediaItem::trackNumber()
 {
     if ( parentItem() )
     {

src/GUI/AbstractGraphicsMediaItem.h

@@ -51,7 +51,7 @@ public:
     virtual const QUuid& uuid() const = 0;
 
     /// Return the current track of the item
-    int trackNumber();
+    quint32 trackNumber();
 
 protected:
     /**

src/GUI/TracksView.cpp

@@ -260,11 +260,9 @@ void TracksView::moveMediaItem( AbstractGraphicsMediaItem* item, QPoint position
     moveMediaItem( item, track->trackNumber(), (qint64)time);
 }
 
-void TracksView::moveMediaItem( AbstractGraphicsMediaItem* item, int track, qint64 time )
+void TracksView::moveMediaItem( AbstractGraphicsMediaItem* item, quint32 track, qint64 time )
 {
-    if ( track < 0 )
-        track = 0;
-    else if ( track > m_numVideoTrack - 1)
+    if ( track > m_numVideoTrack - 1)
         track = m_numVideoTrack - 1;
 
     QPointF oldPos = item->pos();

src/GUI/TracksView.h

@@ -85,7 +85,7 @@ private:
     void                    addVideoTrack();
     void                    addAudioTrack();
     void                    moveMediaItem( AbstractGraphicsMediaItem* item, QPoint position );
-    void                    moveMediaItem( AbstractGraphicsMediaItem* item, int track, qint64 time );
+    void                    moveMediaItem( AbstractGraphicsMediaItem* item, quint32 track, qint64 time );
     GraphicsTrack*          getTrack( unsigned int number );
     QGraphicsScene*         m_scene;
     int                     m_tracksHeight;
@@ -94,8 +94,8 @@ private:
     int                     m_fps;
     GraphicsCursorItem*     m_cursorLine;
     QGraphicsLinearLayout*  m_layout;
-    int                     m_numVideoTrack;
-    int                     m_numAudioTrack;
+    quint32                 m_numVideoTrack;
+    quint32                 m_numAudioTrack;
     MainWorkflow*           m_mainWorkflow;
     GraphicsMovieItem*      m_dragItem;
     QGraphicsWidget*        m_separator;