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
OneAxis oaxOverlay = null;
		int iTickStyle, iAxisType, j, iTitleLocation;
		int iOverlayCount = aax.getOverlayCount( );
		int iOrientation = aax.getOrientation( );
		double dStart, dEnd, dAxisLabelsThickness;
		Label laAxisTitle;
		Scale scModel;
		Series[] sea = cwa.getSeries( IConstants.ORTHOGONAL );
		Map seriesRenderingHints = rtc.getSeriesRenderers( );
		
		for ( int i = 0; i < iOverlayCount; i++ )
		{
			
			j = iOverlayCount - i - 1;
			
			oaxOverlay = aax.getOverlay( j );
			iTickStyle = oaxOverlay.getCombinedTickStyle( );
			iTitleLocation = oaxOverlay.getTitlePosition( );
			laAxisTitle = oaxOverlay.getTitle( );
			iAxisType = getAxisType( axaOrthogonal[j] );
			scModel = axaOrthogonal[j].getScale( );
			sc = AutoScale.computeScale( ids,
					oaxOverlay,
					new DataSetIterator( getMinMax( axaOrthogonal[j], iAxisType ),
							iAxisType ),
					iAxisType,
					dAxisStart,
					dAxisEnd,
					scModel,
					axaOrthogonal[j].getFormatSpecifier( ),