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
}
		ScriptHandler.callFunction( sh,
				ScriptHandler.AFTER_DRAW_LEGEND_ITEM,
				lerh,
				bo,
				getRunTimeContext( ).getScriptContext( ) );
		getRunTimeContext( ).notifyStructureChange( IStructureDefinitionListener.AFTER_DRAW_LEGEND_ITEM,
				lerh );
		ScriptHandler.callFunction( sh,
				ScriptHandler.AFTER_DRAW_LEGEND_ENTRY,
				la,
				getRunTimeContext( ).getScriptContext( ) );
		getRunTimeContext( ).notifyStructureChange( IStructureDefinitionListener.AFTER_DRAW_LEGEND_ENTRY,
				la );
	}
	/**
	 * Renders the Plot
	 * 
	 * @param ipr
	 *            The Primitive Renderer of a Device Renderer
	 * @param p
	 *            The Plot to render
	 * 
	 * @throws ChartException
	 */
	public void renderPlot( IPrimitiveRenderer ipr, Plot p )
			throws ChartException
	{
		if ( !p.isVisible( ) ) 
		{