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/PlotWith2DAxes.java
oaxBase.getLabel( ),
									oaxBase.getLabelPosition( ),
									VERTICAL,
									dStart,
									dEnd,
									false,
									null );
						}
					}
				}
			}
		}
	}
	/**
	 * 
	 * @param aax
	 * @param dAxisStart
	 * @param dAxisEnd
	 * @param dBlockStart
	 * @param dBlockLength
	 * 
	 * @throws PluginException
	 * @throws DataSetException
	 * @throws GenerationException
	 */
	private final void updateOverlayScales( AllAxes aax, double dAxisStart,
			double dAxisEnd, double dBlockStart, double dBlockLength )
			throws ChartException, IllegalArgumentException
	{
		final Axis[] axa = ( (ChartWithAxesImpl) cwa ).getPrimaryBaseAxes( );