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
{
						bb = Methods.computeBox( xs, IConstants.ABOVE, la, 0, 0 );
					}
					catch ( IllegalArgumentException uiex )
					{
						throw new ChartException( ChartEnginePlugin.ID,
								ChartException.RENDERING,
								uiex );
					}
					dReducedSpace = dOriginalTextWidth - bb.getWidth( );
					idx++;
				}
				if ( bb != null )
				{
					return new double[]{
							bb.getWidth( ), bb.getHeight( )
					};
				}
			}
		}
		return null;
	}
	private boolean isValidValue( Object obj )
	{
		if ( obj == null )
		{
			return false;
		}
		if ( obj instanceof Double )
		{