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
*/
	public final void set( DeferredCache _dc )
	{
		dc = _dc;
	}
	/**
	 * Sets the device renderer for current renderer.
	 */
	public final void set( IDeviceRenderer _ir )
	{
		ir = _ir;
	}
	/**
	 * Sets the diplay server for current renderer.
	 */
	public final void set( IDisplayServer _xs )
	{
		xs = _xs;
	}
	/**
	 * Sets the series rendering hints for current renderer.
	 */
	public final void set( ISeriesRenderingHints _srh )
	{
		srh = _srh;
	}
	/**
	 * Setes all associated renderers used for current chart rendering.
	 */
	public final void set( BaseRenderer[] _brna )