Bug 179913 Meter Chart color by categories with null values does not work correctly [0001]
Description: Meter Chart color by categories with null values does not work correctly. Build number: 2.2.0.v20070329-1055 Steps to reproduce: 1. New a Meter Chart with values as follows: Moto, null; Nokia, 58; null, 66; Benq, null. 2. In "Format Chart" tab, select "Series" node, choose "Color by Categories". 3. Preview. Expected result: 1. The needle which shows the second value should take the second color. 2. There should be four in the legend area and the third name is null. Actual result: 1. The needle which shows the second value should take the first color. 2. There should be three in the legend area. Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/LegendBuilder.java
throw new ChartException( ChartEnginePlugin.ID,
						ChartException.GENERATION,
						"exception.illegal.rendering.direction", 
						new Object[]{
							direction
						},
						Messages.getResourceBundle( xs.getULocale( ) ) );
			}
		}
		else
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.GENERATION,
					"exception.illegal.rendering.orientation", 
					new Object[]{
						orientation
					},
					Messages.getResourceBundle( xs.getULocale( ) ) );
		}
		if ( size == null )
		{
			return SizeImpl.create( 0, 0 );
		}
		double dWidth = size[0], dHeight = size[1];
		if ( iTitlePos != -1 )
		{
			double shadowness = 3 * legendData.dScale;
			switch ( iTitlePos )
			{
				case Position.ABOVE :