Bug 212370 [Regression] Negative value can not be shown both in chart builder and when preview [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
dpa,
				scBase,
				scOrthogonal,
				ssl,
				dsiDataBase,
				dsiDataOrthogonal );
	}
	public final StackedSeriesLookup getStackedSeriesLookup( )
	{
		return ssl;
	}
	public void addMargin( int percent )
	{
		if ( percent > 0 )
		{
			iMarginPercent = percent;
		}
	}
	
	/**
	 * Initializes the chart plot bounds for the dynamic size case.
	 * 
	 * @param bo
	 *            bounds with dynamic size, such as 0 or negative value
	 * @throws ChartException
	 * @since 2.3
	 */
	public final void initDynamicPlotBounds( Bounds bo ) throws ChartException
	{