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
dX2 += Math.max( bTicksRight ? TICK_SIZE : 0,
								dAppliedYAxisPlotSpacing );
					}
					else if ( oaxOverlay.getLabelPosition( ) == RIGHT )
					{
						dX1 -= dDecorationThickness[0];
						dX2 += Math.max( ( bTicksRight ? TICK_SIZE : 0 )
								+ dAxisLabelsThickness,
								dAppliedYAxisPlotSpacing );
					}
					if ( iTitleLocation == LEFT )
					{
						dX1 -= dAxisTitleThickness;
					}
					else if ( iTitleLocation == RIGHT )
					{
						dX2 += dAxisTitleThickness;
					}
					
					if ( dX1 < dBlockStart )
					{
						final double dDelta = ( dBlockStart - dX1 );
						dX1 = dBlockStart;
						dX += dDelta;
						dX2 += dDelta;
					}
					dBlockStart += ( dX2 - dX1 ); 
				}
				else if ( iv.getType( ) == IntersectionValue.MAX )
				{