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
printableLayers = createPrintableLayers( );
		return printableLayers;
	}
	/**
	 * Resets size of column.
	 * 
	 * @param start
	 * @param end
	 * @param value
	 */
	public void resizeColumn( int start, int end, int value )
	{
		Object startColumn = getColumn( start );
		ColumnHandleAdapter startAdapt = HandleAdapterFactory.getInstance( )
				.getColumnHandleAdapter( startColumn );
		Object endColumn = getColumn( end );
		ColumnHandleAdapter endAdapt = HandleAdapterFactory.getInstance( )
				.getColumnHandleAdapter( endColumn );
		int startWidth = 0;
		int endWidth = 0;
		startWidth = TableUtil.caleVisualWidth( this, startColumn );
		endWidth = TableUtil.caleVisualWidth( this, endColumn );
		try
		{
			getTableAdapter( ).transStar( RESIZE_COLUMN_TRANS_LABEL ); 
			startAdapt.setWidth( startWidth + value );
			endAdapt.setWidth( endWidth - value );
			getTableAdapter( ).transEnd( );
		}
		catch ( SemanticException e )