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 ( !_bImageExternallySpecified )
		{
			_img.flush( );
			_img = null;
		}
		
		_g2d.dispose( );
		_g2d = null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDeviceRenderer#setProperty(java.lang.String,
	 *      java.lang.Object)
	 */
	public void setProperty( String sProperty, Object oValue )
	{
		super.setProperty( sProperty, oValue );
		if ( sProperty.equals( IDeviceRenderer.EXPECTED_BOUNDS ) )
		{
			_bo = (Bounds) oValue;
		}
		else if ( sProperty.equals( IDeviceRenderer.CACHED_IMAGE ) )
		{
			_img = (Image) oValue;
		}
		else if ( sProperty.equals( IDeviceRenderer.FILE_IDENTIFIER ) )
		{
			_oOutputIdentifier = oValue;