Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWithAxes.java
Series[] sea;
		for ( int i = 0; i < axaOrthogonal.length; i++ )
		{
			sea = axaOrthogonal[i].getRuntimeSeries( );
			for ( int j = 0; j < sea.length; j++ )
			{
				if ( sea[j] == se )
				{
					if ( i == 0 ) 
					
					{
						return aax.getPrimaryOrthogonal( );
					}
					return aax.getOverlay( i - 1 );
				}
			}
		}
		return null;
	}
	/**
	 * This method validates several crucial properties for an axis associated
	 * with a Chart
	 * 
	 * @param ax
	 *            The axis to validate
	 * @throws ValidationException
	 */
	protected void validateAxis( Axis ax ) throws ChartException
	{
		if ( !ax.isSetType( ) )