Bug 160954 Legend area disappears when tick Show Value check box for Gantt chart
Legend area disapears when tick Show Value check box for Gantt chart Steps to reproduce: 1. Create a Gantt Chart. 2. Double click the chart, select "Format Chart" button, go to Chart Area->Legend, tick "Legend Visible" check box, tick "Value: Show Value" check box Expected result: Value is shown. Actual result: The legend area dispears.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/LegendBuilder.java
"exception.base.axis.no.series.definitions", 
						Messages.getResourceBundle( xs.getULocale( ) ) );
			}
			
			sdBase = (SeriesDefinition) ( (ChartWithoutAxes) cm ).getSeriesDefinitions( )
					.get( 0 );
		}
		
		Series seBase = (Series) sdBase.getRunTimeSeries( ).get( 0 );
		DataSetIterator dsiBase = null;
		try
		{
			dsiBase = new DataSetIterator( seBase.getDataSet( ) );
		}
		catch ( Exception ex )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.GENERATION,
					ex );
		}
		FormatSpecifier fs = null;
		if ( sdBase != null )
		{
			fs = sdBase.getFormatSpecifier( );
		}
		int pos = -1;
		while ( dsiBase.hasNext( ) )
		{
			Object obj = dsiBase.next( );