Bug 214197 [Regression] Auto scale does not work correctly [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
* @param zoomFactor
	 *            1 is default factor
	 * @param iMarginPercent
	 *            the percentage of margin area for display some charts, such as
	 *            bubble. 0 means no margin
	 * @return AutoScale instance
	 * @throws ChartException
	 */
	static final AutoScale computeScale( IDisplayServer xs, OneAxis ax,
			DataSetIterator dsi, int iType, double dStart, double dEnd,
			Scale scModel, FormatSpecifier fs, RunTimeContext rtc,
			int direction, double zoomFactor, int iMarginPercent )
			throws ChartException
	{
		return computeScale( xs,
				ax,
				dsi,
				iType,
				dStart,
				dEnd,
				scModel,
				null,
				fs,
				rtc,
				direction,
				zoomFactor,
				iMarginPercent );
	}
	/**
	 *