Bug 153038 NPE when delete master page content in old report design.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/ListEditPart.java
public boolean isIncludeSlotHandle( int id )
	{
		Object model = getListHandleAdapt( ).getChild( id );
		ListBandEditPart part = (ListBandEditPart) getViewer( )
				.getEditPartRegistry( ).get( model );
		if ( part == null )
		{
			return false;
		}
		return part.isRenderVisile( );
	}
	public void showTargetFeedback( Request request )
	{
		if ( this.getSelected( ) == 0 && isActive( )
				&& request.getType( ) == RequestConstants.REQ_SELECTION )
		{
			if ( isFigureLeft( request ) )
			{
				this.getViewer( ).setCursor(
						ReportPlugin.getDefault( ).getLeftCellCursor( ) );
			}
			else
			{
				this.getViewer( ).setCursor(
						ReportPlugin.getDefault( ).getRightCellCursor( ) );
			}
		}
		super.showTargetFeedback( request );
	}
	public void eraseTargetFeedback( Request request )