Bug 188029 Top face is missing in Area chart of 2D+ with negative values
Top face is missing in Area chart of 2D+ with negative values. Please see attached screenshot.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
oMin = oV1;
						}
					}
				}
				if ( oV2 != null ) 
				{
					if ( oMax == null )
					{
						oMax = oV2;
					}
					else
					{
						final double dV2 = asDouble( oV2 ).doubleValue( );
						if ( Math.max( asDouble( oMax ).doubleValue( ), dV2 ) == dV2 )
						{
							oMax = oV2;
						}
					}
				}
			}
			else if ( ( iType & DATE_TIME ) == DATE_TIME )
			{
				if ( oV1 != null ) 
				{
					if ( oMin == null )
					{
						oMin = oV1;
					}
					else
					{