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
* @see org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.ReportElementEditPart#createEditPolicies()
	 */
	protected void createEditPolicies( )
	{
		installEditPolicy( EditPolicy.COMPONENT_ROLE,
				new ReportComponentEditPolicy( ) );
		installEditPolicy( EditPolicy.CONTAINER_ROLE,
				new ReportContainerEditPolicy( ) );
		installEditPolicy( EditPolicy.LAYOUT_ROLE, new ListLayoutEditPolicy( ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.ReportElementEditPart#refreshFigure()
	 */
	public void refreshFigure( )
	{
		refreshBorder( getListHandleAdapt( ).getHandle( ),
				(BaseBorder) getFigure( ).getBorder( ) );
		( (SectionBorder) ( getFigure( ).getBorder( ) ) )
				.setPaddingInsets( getListHandleAdapt( ).getPadding(
						getFigure( ).getInsets( ) ) );
		refreshMargin( );
		refreshBackground( (DesignElementHandle) getModel( ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractEditPart#refreshChildren()
	 */