Bug 177483 [Regression] The value in chart area and legend area are different for Meter chart [0001]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/LegendBuilder.java
{
			dHeight = -legendData.dVerticalReservedSpace;
		}
		else
		{
			legendData.legendItems.addAll( columnList );
		}
		columnList.clear( );
		dHeight += dExtraHeight + legendData.dVerticalReservedSpace;
		dWidth = Math.max( dWidth, dRealWidth );
		return new double[]{
				dWidth, dHeight
		};
	}
	private double[] computeHorizalByTopBottomValue( IDisplayServer xs,
			Chart cm, SeriesDefinition[] seda, RunTimeContext rtc,
			ITextMetrics itm, Label la, LegendData legendData )
			throws ChartException
	{
		double dWidth = 0, dHeight = 0;
		double dH, dMaxH = 0, dRowHeight;
		double dRealWidth = 0, dExtraHeight = 0, dDeltaWidth;
		ArrayList columnList = new ArrayList( );
		
		legendData.dSeparatorThickness += legendData.dVerticalSpacing;
		for ( int j = 0; j < seda.length; j++ )
		{
			dWidth = 0;
			List al = seda[j].getRunTimeSeries( );
			FormatSpecifier fs = seda[j].getFormatSpecifier( );