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
double dMaxLegendWidth = boFull.getWidth( ) / 3;
		double dMaxLegendHeight = boFull.getHeight( ) / 3;
		switch ( lgPosition.getValue( ) )
		{
			case Position.LEFT :
			case Position.RIGHT :
			case Position.OUTSIDE :
				if ( legendData.dAvailableWidth > dMaxLegendWidth )
				{
					legendData.dAvailableWidth = dMaxLegendWidth;
				}
				break;
			case Position.ABOVE :
			case Position.BELOW :
				if ( legendData.dAvailableHeight > dMaxLegendHeight )
				{
					legendData.dAvailableHeight = dMaxLegendHeight;
				}
				break;
		}
		
		boolean bMinSliceDefined = false;
		if ( cm instanceof ChartWithoutAxes )
		{
			bMinSliceDefined = ( (ChartWithoutAxes) cm ).isSetMinSlice( );
			legendData.sMinSliceLabel = ( (ChartWithoutAxes) cm ).getMinSliceLabel( );
			if ( legendData.sMinSliceLabel == null
					|| legendData.sMinSliceLabel.length( ) == 0 )
			{