Bug 210635 Incorrect preview of chart after reverse categories.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
int iAxisType = ( aax.getOverlayCount( ) > 0 ) ? aax.getOverlay( 0 )
				.getScale( )
				.getType( ) : 0;
		Label la;
		for ( int i = 0; i < aax.getOverlayCount( ); i++ )
		{
			axOverlay = aax.getOverlay( i );
			la = axOverlay.getLabel( );
			scOA = axOverlay.getScale( );
			scOA.setEndPoints( scOA.getStart( )
					- scOA.getStartShift( )
					* iDirection, scOA.getEnd( )
					+ scOA.getEndShift( )
					* iDirection );
			dStart = sc.getStart( );
			dEnd = sc.getEnd( );
			scOA.setEndPoints( dStart, dEnd );
			scOA.computeTicks( ids,
					la,
					axOverlay.getLabelPosition( ),
					aax.getOrientation( ),
					dStart,
					dEnd,
					false,
					null );
			if ( !scOA.isStepFixed( ) )
			{
				oaMinMax = scOA.getMinMax( );
				while ( !scOA.checkFit( ids, la, axOverlay.getLabelPosition( ) ) )
				{