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
legendData.legendItems.addAll( columnList );
					columnList.clear( );
					dExtraHeight += dRowHeight;
					dHeight = dFHeight;
					dRealWidth = Math.max( dRealWidth, dWidth );
					dWidth = dDeltaWidth;
					columnList.add( new LegendItemHints( LEGEND_MINSLICE_ENTRY,
							new Point( dWidth - dDeltaWidth, dExtraHeight ),
							dFWidth,
							dFHeight,
							la.getCaption( ).getValue( ),
							dsiBase.size( ) ) );
				}
			}
			else
			{
				dHeight = Math.max( dFHeight, dHeight );
				dWidth += dDeltaWidth;
				columnList.add( new LegendItemHints( LEGEND_MINSLICE_ENTRY,
						new Point( dWidth - dDeltaWidth, dExtraHeight ),
						dFWidth,
						dFHeight,
						la.getCaption( ).getValue( ),
						dsiBase.size( ) ) );
			}
		}
		
		dRowHeight = dHeight + legendData.dVerticalReservedSpace;
		if ( dExtraHeight + dRowHeight > legendData.dAvailableHeight
				+ legendData.dSafeSpacing )