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/AxisSubUnit.java
*/
	public final void setPositiveTotal( double dPositiveTotal )
	{
		this.dPositiveTotal = dPositiveTotal;
	}
	/**
	 * 
	 * @return
	 */
	public final double getPositiveTotal( )
	{
		return dPositiveTotal;
	}
	/**
	 * 
	 * @param dPositiveTotal
	 */
	public final void setNegativeTotal( double dNegativeTotal )
	{
		this.dNegativeTotal = dNegativeTotal;
	}
	/**
	 * 
	 * @return
	 */
	public final double getNegativeTotal( )
	{
		return dNegativeTotal;
	}
	/**