Solving crash when adding a clip, undo, redo, and finally moving the clip.

src/GUI/AbstractGraphicsMediaItem.h

@@ -63,7 +63,7 @@ protected:
     /**
      * Contains the old trackNumber
      */
-    int oldTrackNumber;
+    unsigned int oldTrackNumber;
     /**
      * Contains the old position
      */

src/GUI/GraphicsCursorItem.cpp

@@ -8,6 +8,7 @@ GraphicsCursorItem::GraphicsCursorItem( const QPen& pen )
     setCursor( QCursor( Qt::SizeHorCursor ) );
     setZValue( 100 );
 
+//    int height;
     m_boundingRect = QRectF( -2, 0, 3, height );
 }
 

src/GUI/TracksView.cpp

@@ -146,6 +146,7 @@ void TracksView::addMediaItem( Clip* clip, unsigned int track, qint64 start )
     item->setWidth( clip->getLength() );
     item->setHeight( tracksHeight() );
     item->setParentItem( getTrack( track ) );
+    item->oldTrackNumber = track;
     moveMediaItem( item, track, start );
 }
 
@@ -371,7 +372,6 @@ void TracksView::dropEvent( QDropEvent* event )
                                                                 clip,
                                                                 m_dragItem->trackNumber(),
                                                                 (qint64)mappedXPos ) );
-        m_dragItem->oldPosition = mappedXPos;
         m_dragItem = NULL;
     }
 }