Bug 208373 Auto resize Chart to have a single axis without blank
When Chart is within Cross tab, chart axis image should have a single axis only, but there may be much blank in other area. Chart engine should auto resize the image to have the axis with fit size. Meanwhile, report engine should not set size for chart image.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
{
		if ( seOrthogonal == null
				|| seOrthogonal.getClass( ) == SeriesImpl.class )
		{
			
			return null;
		}
		OneAxis oaxOrthogonal = findOrthogonalAxis( seOrthogonal );
		if ( oaxOrthogonal == null )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.NOT_FOUND,
					"exception.axis.series.link.broken", 
					new Object[]{
						seOrthogonal
					},
					Messages.getResourceBundle( rtc.getULocale( ) ) );
		}
		final OneAxis oaxBase = aax.getPrimaryBase( );
		final SeriesDefinition sdBase = (SeriesDefinition) oaxBase.getModelAxis( )
				.getSeriesDefinitions( )
				.get( 0 );
		final AutoScale scBase = oaxBase.getScale( );
		final AutoScale scOrthogonal = oaxOrthogonal.getScale( );
		final int iTickCount = scBase.getTickCount( );
		int iUnitCount = iTickCount;
		final int iDirection = scBase.getDirection( );
		
		final double dUnitSize = ( iDirection == BACKWARD || ( iDirection == AUTO && aax.areAxesSwapped( ) ) ) ? -scBase.getUnitSize( )
				: scBase.getUnitSize( );