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
ArrayList al = new ArrayList( );
				while ( ( i < loPoints.length )
						&& !( Double.isNaN( loPoints[i].getX( ) ) || Double.isNaN( loPoints[i].getY( ) ) ) )
				{
					al.add( loPoints[i] );
					i += 1;
				}
				i -= 1;
				
				
				
				
				
				
				{
					tempPoints = (Location[]) al.toArray( new Location[al.size( )] );
				}
				faX = LocationImpl.getXArray( tempPoints );
				faY = LocationImpl.getYArray( tempPoints );
				iNumberOfPoints = faX.length;
				if ( iNumberOfPoints > 1 )
				{
					
					spX = new Spline( faX ); 
					
					spY = new Spline( faY ); 
					fa = new double[iNumberOfPoints];
					for ( int j = 0; j < iNumberOfPoints; j++ )
					{
						fa[j] = j;