Bug 176582 "Show Lines as Curves" does not work correctly for Area Chart [0001]
Description: "Show Lines as Curves" does not work correctly for Area Chart. Build number: 2.2.0.v20070307-1128 Steps to reproduce: 1. New a Area Chart. 2. In "Format Chart" tab, select Series->Value (Y) Series, tick and untick "Show Lines as Curves" checkbox. Expected result: Null value point e is treated the same when tick and untick "Show Lines as Curves" checkbox. Actual result: Null value point e is treated differently (see the screenshot). Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/CurveRenderer.java
pa[pa.length - 3].getY( ) );
				pa[pa.length - 1] = LocationImpl.create( zeroLocation,
						pa[0].getY( ) );
			}
			else
			{
				pa[pa.length - 2] = LocationImpl.create( pa[pa.length - 3].getX( ),
						zeroLocation );
				pa[pa.length - 1] = LocationImpl.create( pa[0].getX( ),
						zeroLocation );
			}
			pre.setOutline( null );
			pre.setPoints( pa );
			pre.setBackground( fillColor );
			if ( bDeferred )
			{
				dc.addPlane( pre, PrimitiveRenderEvent.FILL );
			}
			else
			{
				ipr.fillPolygon( pre );
			}
			if ( lia.isSetVisible( ) && lia.isVisible( ) )
			{
				for ( int i = 0; i < points.size( ) - 1; i++ )
				{
					lre.setStart( pa[i] );
					lre.setEnd( pa[i + 1] );
					if ( bDeferred )
					{