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/BaseRenderer.java
final boolean bLastInSequence = ( iSeriesIndex == iSeriesCount - 1 );
		boolean bStarted = bFirstInSequence;
		long lTimer = System.currentTimeMillis( );
		Block bl = cm.getBlock( );
		final Enumeration e = bl.children( true );
		final BlockGenerationEvent bge = new BlockGenerationEvent( this );
		final IDeviceRenderer idr = getDevice( );
		final ScriptHandler sh = getRunTimeContext( ).getScriptHandler( );
		if ( bFirstInSequence )
		{
			
			ScriptHandler.callFunction( sh,
					ScriptHandler.BEFORE_DRAW_BLOCK,
					bl,
					getRunTimeContext( ).getScriptContext( ) );
			getRunTimeContext( ).notifyStructureChange( IStructureDefinitionListener.BEFORE_DRAW_BLOCK,
					bl );
			bge.updateBlock( bl );
			renderChartBlock( idr, bl, StructureSource.createChartBlock( bl ) );
			ScriptHandler.callFunction( sh,
					ScriptHandler.AFTER_DRAW_BLOCK,
					bl,
					getRunTimeContext( ).getScriptContext( ) );
			getRunTimeContext( ).notifyStructureChange( IStructureDefinitionListener.AFTER_DRAW_BLOCK,
					bl );
		}
		
		while ( e.hasMoreElements( ) )
		{
			bl = (Block) e.nextElement( );