Bug 171533 Pie chart legends are truncated
This only happens with a title for the legend. There is a small bug in the layout algorithm that causes the clipping in such case.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/LegendBuilder.java
{
				throw new ChartException( ChartEnginePlugin.ID,
						ChartException.GENERATION,
						"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( ) )