Bug 118738 can't preview meter chart with grouping
Try to preview the following report with a meter chart group on the Y series, it fails. It used to work before, this is a regression. An exception is thrown org.eclipse.birt.chart.exception.ChartException: Can not plot meter series with null or non-numeric datapoint. at org.eclipse.birt.chart.render.DialRenderer.<init>(DialRenderer.java:132) at org.eclipse.birt.chart.render.Dial.compute(Dial.java:98) at org.eclipse.birt.chart.factory.Generator.build(Generator.java:759)
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/JavaxImageIOWriter.java
}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.imageio.event.IIOWriteWarningListener#warningOccurred(javax.imageio.ImageWriter,
	 *      int, java.lang.String)
	 */
	public void warningOccurred( ImageWriter source, int imageIndex,
			String warning )
	{
		logger.log( ILogger.WARNING, warning );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDeviceRenderer#presentException(java.lang.Exception)
	 */
	public void presentException( Exception cexp )
	{
		if ( _bo == null )
		{
			_bo = BoundsImpl.create( 0, 0, 400, 300 );
		}
		String sWrappedException = cexp.getClass( ).getName( );
		while ( cexp.getCause( ) != null )
		{
			cexp = (Exception) cexp.getCause( );
		}
		String sException = cexp.getClass( ).getName( );