Bug 135465 [smoke]An error occurred when new a casading Parameter
Description: An error occurred when new a casading Parameter Step to reproduce: 1.new a sample db data source and data set 2.New a cascading parameter group, named "gp1", 3.select the data set, then create two cascading parameters, one is row["customernumber"], named p1; the other is row["customername"] Actual result; error message occurred repeatly
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
deleteRow( );
				}
			}
		} );
		int[] columnWidths = new int[]{
				180, 145, 145,
		};
		String[] columnProps = new String[]{
				COLUMN_NAME, COLUMN_VALUE, COLUMN_DISPLAY_TEXT
		};
		String[] columnLabels = new String[]{
				COLUMN_NAME_LABEL,
				COLUMN_VALUE_LABEL,
				COLUMN_DISPLAY_TEXT_LABEL
		};
		cellEditors = new CellEditor[]{
				new TextCellEditor( table ),
				new ComboBoxCellEditor( table, new String[0], SWT.READ_ONLY ),
				new ComboBoxCellEditor( table, new String[0], SWT.READ_ONLY ),
		};
		for ( int i = 0; i < columnProps.length; i++ )
		{
			TableColumn column = new TableColumn( table, SWT.LEFT );
			column.setResizable( true );
			column.setText( columnLabels[i] );
			column.setWidth( columnWidths[i] );
		}
		valueTable = new TableViewer( table );
		valueTable.setCellEditors( cellEditors );
		valueTable.setColumnProperties( columnProps );