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
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 )
						{
							dc.addLine( lre );
						}
						else
						{
							ipr.drawLine( lre );
						}
					}
				}
				return;
			}
		}
		if ( bRendering3D )
		{
			Location3D[] pa = new Location3D[points.size( ) + 2];
			double[] pt0 = (double[]) points.get( 0 );
			if ( pt0[1] > zeroLocation )
			{
				for ( int i = 1; i < points.size( ); i++ )
				{
					double[] pt = (double[]) points.get( i );
					pa[pa.length - i] = Location3DImpl.create( pt[0],
							pt[1],