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/CurveRenderer.java
}
			if ( Double.isNaN( ll[i].getY( ) ) )
			{
				ll[i].setY( boClientArea.getTop( ) + boClientArea.getHeight( ) );
			}
			al.add( ll[i] );
		}
		if ( ll instanceof Location3D[] )
		{
			return (Location3D[]) al.toArray( new Location3D[al.size( )] );
		}
		return (Location[]) al.toArray( new Location[al.size( )] );
	}
	/**
	 * 
	 * @param ipr
	 * @throws RenderingException
	 */
	public final void draw( IPrimitiveRenderer ipr ) throws ChartException
	{
		if ( !lia.isSetVisible( ) )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.RENDERING,
					"exception.curve.visibility.unset", 
					Messages.getResourceBundle( iRender.getRunTimeContext( )
							.getULocale( ) ) );
		}
		if ( !bFillArea && !lia.isVisible( ) )
		{