Bug 188029 Top face is missing in Area chart of 2D+ with negative values
Top face is missing in Area chart of 2D+ with negative values. Please see attached screenshot.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/StackedSeriesLookup.java
new Object[]{
											new Integer( ssl.iCachedUnitCount ),
											new Integer( iDataSetCount )
									} )
							);
						}
						if ( se.canBeStacked( ) )
						{
							if ( !se.isSetStacked( ) )
							{
								throw new ChartException( ChartEnginePlugin.ID,
										ChartException.UNDEFINED_VALUE,
										"exception.unset.series.stacked.property", 
										new Object[]{
											se
										},
										Messages.getResourceBundle( 
												rtc.getULocale( ) ) );
							}
							if ( se.canShareAxisUnit( ) )
							{
								if ( se.isStacked( ) )
								{
									if ( k > 0 && !bStackedSet )
									{
										throw new IllegalArgumentException( MessageFormat.format( Messages.getResourceBundle( 
												rtc.getULocale( ) )
												.getString( "exception.stacked.unstacked.mix.series" ),  
												new Object[]{
													sd