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
else
					{
						loa3d[0].set( x2 + kError, y2 + kError, z2 );
						loa3d[1].set( x2 + kError, y2 + kError, z2 - dTapeWidth );
						loa3d[2].set( x2 + kError, zeroLocation, z2
								- dTapeWidth );
						loa3d[3].set( x2 + kError, zeroLocation, z2 );
					}
				}
				pre.setPoints3D( loa3d );
				dc.addPlane( pre, PrimitiveRenderEvent.FILL );
			}
		}
		else
		{
			final PolygonRenderEvent pre = (PolygonRenderEvent) ( (EventObjectCache) ipr ).getEventObject( oSource,
					PolygonRenderEvent.class );
			pre.setOutline( null );
			pre.setBackground( tapeColor );
			loa[0].set( x1 + kError, y1 + kError );
			loa[1].set( x2 + kError, y2 + kError );
			loa[2].set( x2 + kError + dTapeWidth, y2 + kError - dTapeWidth );
			loa[3].set( x1 + kError + dTapeWidth, y1 + kError - dTapeWidth );
			pre.setPoints( loa );
			if ( bDeferred )
			{
				dc.addPlane( pre, PrimitiveRenderEvent.FILL );
			}
			else
			{