* fixed issue when moving BB-tracks up/down where actual BB-TCOs were not moved

* in trackContentObjectView and trackView, handle deletion of models more gracefully



git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1137 0778d3d1-df1d-0410-868b-ea421aaaa00d

include/track.h

@@ -113,6 +113,7 @@ protected slots:
 signals:
 	void lengthChanged( void );
 	void positionChanged( void );
+	void destroyed( void );
 
 
 private:
@@ -453,6 +454,7 @@ private:
 
 signals:
 	void trackContentObjectAdded( trackContentObject * );
+	void destroyed( void );
 
 } ;