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
{
			
		}
		double[] daTickCoordinates = scBase.getTickCordinates( );
		Object oDataBase = null;
		DataSetIterator dsiDataBase = scBase.getData( );
		Object oDataOrthogonal;
		DataSetIterator dsiDataOrthogonal = getTypedDataSet( seOrthogonal,
				oaxOrthogonal.getScale( ).getType( ) );
		double dOrthogonalZero = 0;
		if ( ( scOrthogonal.getType( ) & NUMERICAL ) == NUMERICAL )
		{
			dOrthogonalZero = getLocation( scOrthogonal, 0 );
		}
		else
		{
			dOrthogonalZero = scOrthogonal.getStart( );
		}
		double dBaseZero = 0;
		if ( ( scBase.getType( ) & NUMERICAL ) == IConstants.NUMERICAL
				&& !oaxBase.isCategoryScale( ) )
		{
			dBaseZero = getLocation( scBase, 0 );
		}
		else if ( oaxBase.isTickBwtweenCategories( ) )
		{
			dBaseZero = scBase.getStart( );
		}
		else
		{