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
case PathIterator.SEG_CUBICTO :
					al.add( new Double( data[0] ) );
					al.add( new Double( data[1] ) );
					al.add( new Double( data[2] ) );
					al.add( new Double( data[3] ) );
					al.add( new Double( data[4] ) );
					al.add( new Double( data[5] ) );
					break;
				case PathIterator.SEG_CLOSE :
					break;
			}
			pitr.next( );
		}
		if ( al.size( ) == 0 )
		{
			return null;
		}
		StringBuffer sb = new StringBuffer( );
		for ( int i = 0; i < al.size( ); i++ )
		{
			Double db = (Double) al.get( i );
			if ( i > 0 )
			{
				sb.append( "," ); 
			}
			sb.append( (int) db.doubleValue( ) );
		}
		return sb.toString( );
	}
	private boolean checkSupportedAction( Action action )