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[] daX = axPH.getScale( ).getEndPoints( );
		double[] daY = axPV.getScale( ).getEndPoints( );
		if ( axPH.getScale( ).getDirection( ) == BACKWARD )
		{
			boPlotBackground.setLeft( daX[1] - insCA.getLeft( ) );
			boPlotBackground.setWidth( daX[0]
					- daX[1]
					+ insCA.getLeft( )
					+ insCA.getRight( )
					+ 1 );
		}
		else
		{
			boPlotBackground.setLeft( daX[0] - insCA.getLeft( ) );
			boPlotBackground.setWidth( daX[1]
					- daX[0]
					+ insCA.getLeft( )
					+ insCA.getRight( )
					+ 1 );
		}
		if ( axPV.getScale( ).getDirection( ) == FORWARD )
		{
			boPlotBackground.setTop( daY[0] - insCA.getTop( ) );
			boPlotBackground.setHeight( daY[1]
					- daY[0]
					+ insCA.getTop( )
					+ insCA.getBottom( )
					+ 1 );
		}
		else