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
if ( iad != null )
					{
						double[] thickness = iad.computeDecorationThickness( ids,
								oaxOverlay );
						if ( thickness[0] > dDecorationThickness[0] )
						{
							dDecorationThickness[0] = thickness[0];
						}
						if ( thickness[1] > dDecorationThickness[1] )
						{
							dDecorationThickness[1] = thickness[1];
						}
					}
				}
			}
			double dAxisTitleThickness = 0;
			sc.resetShifts( );
			if ( iOrientation == VERTICAL )
			{
				
				
				double dX = 0, dX1 = 0, dX2 = 0;
				final boolean bTicksLeft = ( iTickStyle & TICK_LEFT ) == TICK_LEFT;
				final boolean bTicksRight = ( iTickStyle & TICK_RIGHT ) == TICK_RIGHT;
				final double dAppliedYAxisPlotSpacing = dYAxisPlotSpacing;
				if ( laAxisTitle.isVisible( ) )
				{
					final String sPreviousValue = laAxisTitle.getCaption( )
							.getValue( );
					laAxisTitle.getCaption( )