Bug 129886 Delect a column contain the marge row which contain some item, Error message pop up
Details: Delect a column contain the marge row which contain some item, Error message pop up Setp: 1.New a library and add a 3*3 grid 2.Insert a label in cell(1,1) 3.Marge the cell of (1,1) and (1,2) 4.Delete column 1. Actual result: An error message pop up
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/TableEditPart.java
*/
	protected void addGroupListener( )
	{
		for ( Iterator it = ( (TableHandle) getModel( ) ).getGroups( )
				.iterator( ); it.hasNext( ); )
		{
			( (DesignElementHandle) it.next( ) ).addListener( this );
		}
	}
	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 )
	{