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
if ( it.hasNext( ) )
				{
					supported = true;
				}
			}
		}
		return supported;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDeviceRenderer#before()
	 */
	public void before( ) throws ChartException
	{
		super.before( );
		_bImageExternallySpecified = ( _img != null );
		
		
		if ( !_bImageExternallySpecified )
		{
			if ( _bo == null ) 
			
			{
				throw new ChartException( ChartDeviceExtensionPlugin.ID,
						ChartException.RENDERING,
						"exception.no.bounds", 
						ResourceBundle.getBundle( Messages.DEVICE_EXTENSION,
								getLocale( ) ) );
			}