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
double[] pt = (double[]) points.get( i );
					lst.add( LocationImpl.create( pt[0], pt[1] ) );
				}
				if ( lastFixedX != null )
				{
					for ( int i = lastFixedX.length - 1; i >= 0; i-- )
					{
						lst.add( LocationImpl.create( lastFixedX[i],
								lastFixedY[i] ) );
					}
				}
				else
				{
					for ( int i = lastX.length - 1; i >= 0; i-- )
					{
						lst.add( LocationImpl.create( lastX[i], lastY[i] ) );
					}
				}
				Location[] pa = (Location[]) lst.toArray( new Location[lst.size( )] );
				pre.setOutline( null );
				pre.setPoints( pa );
				pre.setBackground( fillColor );
				if ( bDeferred )
				{
					dc.addPlane( pre, PrimitiveRenderEvent.FILL );
				}
				else
				{
					ipr.fillPolygon( pre );
				}