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/AxesRenderer.java
/**
	 * Flushes render event of all Series before clipping
	 * 
	 * @throws ChartException
	 */
	protected void flushClipping( ) throws ChartException
	{
		
		getDeferredCacheManager( ).flushOptions( DeferredCache.FLUSH_LINE
				| DeferredCache.FLUSH_PLANE | DeferredCache.FLUSH_PLANE_SHADOW );
	}
	
	/**
	 * Checks data point entry by types
	 * 
	 * @param scale
	 *            AutoScale for min/max value
	 * @param entry
	 *            data point entry
	 * @return int indicates if data point entry is in the range of plot area. 0
	 *         inside, 1 left side, 2 outside
	 */
	protected final int checkEntryByType( AutoScale scale, Object entry )
	{
		int iOutside = 0;
		if ( entry == null )
		{