Bug 210054 Axis labels will disappear when only select the first series as visible.
Description: Axis labels will disappear when only select the first series to display. build version: 2.3 v20071115-0800 steps to reproduce: 1. New a report. 2. New a datasource and dataset. 3. New a bar chart. 4. On Select Data page, create two value series. 5. Switch to Format Chart page, select Series. 6. Uncheck the two Visiable check box to hide the two series. 7. Check the first Visible check box to display the first series. Expected result: The Axis lables should not disappear. Actual result: The Axis lables disappear both in live preview and in preview.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
* 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 )
	{
		brna = _brna;
	}
	/**
	 * Sets the runtime context object for current renderer.
	 */