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
la.getCaption( ).setValue( lgtext );
			itm.reuse( la, legendData.maxWrappingSize );
			BoundingBox bb = null;
			try
			{
				bb = Methods.computeBox( xs, IConstants.ABOVE, la, 0, 0 );
			}
			catch ( IllegalArgumentException uiex )
			{
				throw new ChartException( ChartEnginePlugin.ID,
						ChartException.RENDERING,
						uiex );
			}
			double dFWidth = bb.getWidth( );
			double dFHeight = bb.getHeight( );
			double dDeltaWidth = legendData.insCa.getLeft( )
					+ dFWidth
					+ ( 3 * legendData.dItemHeight )
					/ 2
					+ legendData.insCa.getRight( );
			if ( dWidth + dDeltaWidth > legendData.dAvailableWidth )
			{
				
				dRowHeight = dHeight + legendData.dVerticalReservedSpace;
				if ( dExtraHeight + dRowHeight > legendData.dAvailableHeight
						+ legendData.dSafeSpacing )
				{
					dHeight = -legendData.dVerticalReservedSpace;
					columnList.clear( );
					break;