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
dc.addLine( lre );
					}
					else
					{
						ipr.drawLine( lre );
					}
				}
			}
		}
	}
	/**
	 * 
	 * @param ipr
	 * @param fXOffset
	 * @param fYOffset
	 * @throws RenderingException
	 */
	private final void renderCurve( IPrimitiveRenderer ipr, double fXOffset,
			double fYOffset ) throws ChartException
	{
		final double[] faKnotXY1 = new double[2];
		final double[] faKnotXY2 = new double[2];
		if ( !computeSpline( fa[0], faKnotXY1 ) )
		{
			return;
		}
		int iNumberOfDivisions;
		double fX, fY;
		double[] faXY1, faXY2;
		double fT;