Bug 176582 "Show Lines as Curves" does not work correctly for Area Chart [0001]
Description: "Show Lines as Curves" does not work correctly for Area Chart. Build number: 2.2.0.v20070307-1128 Steps to reproduce: 1. New a Area Chart. 2. In "Format Chart" tab, select Series->Value (Y) Series, tick and untick "Show Lines as Curves" checkbox. Expected result: Null value point e is treated the same when tick and untick "Show Lines as Curves" checkbox. Actual result: Null value point e is treated differently (see the screenshot). Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
}
	}
	/**
	 * Renders the legend block based on the legend rendering rules.
	 * 
	 * @param ipr
	 * @param lg
	 * @param htRenderers
	 * 
	 * @throws ChartException
	 */
	public void renderLegend( IPrimitiveRenderer ipr, Legend lg, Map htRenderers )
			throws ChartException
	{
		if ( !lg.isVisible( ) ) 
		{
			return;
		}
		renderBlock( ipr, lg, StructureSource.createLegend( lg ) );
		final IDisplayServer xs = getDevice( ).getDisplayServer( );
		final double dScale = getDeviceScale( );
		Bounds bo = lg.getBounds( ).scaledInstance( dScale );
		Size sz = null;
		
		
		double dX, dY;
		if ( lg.getPosition( ) != Position.INSIDE_LITERAL )
		{
			try
			{