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
if ( legendData.dAvailableWidth > dMaxLegendWidth )
				{
					legendData.dAvailableWidth = dMaxLegendWidth;
				}
				break;
			case Position.ABOVE :
			case Position.BELOW :
				if ( legendData.dAvailableHeight > dMaxLegendHeight )
				{
					legendData.dAvailableHeight = dMaxLegendHeight;
				}
				break;
		}
		
		boolean bMinSliceDefined = false;
		if ( cm instanceof ChartWithoutAxes )
		{
			bMinSliceDefined = ( (ChartWithoutAxes) cm ).isSetMinSlice( );
			legendData.sMinSliceLabel = ( (ChartWithoutAxes) cm ).getMinSliceLabel( );
			if ( legendData.sMinSliceLabel == null
					|| legendData.sMinSliceLabel.length( ) == 0 )
			{
				legendData.sMinSliceLabel = IConstants.UNDEFINED_STRING;
			}
			else
			{
				legendData.sMinSliceLabel = rtc.externalizedMessage( legendData.sMinSliceLabel );
			}
		}