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
Trigger buildinTg = null;
			if ( cm.getInteractivity( ) != null )
			{
				boolean customed = false;
				switch ( cm.getInteractivity( ).getLegendBehavior( ).getValue( ) )
				{
					case LegendBehaviorType.HIGHLIGHT_SERIE :
						for ( Iterator itr = elTriggers.iterator( ); itr.hasNext( ); )
						{
							tg = (Trigger) itr.next( );
							if ( tg.getCondition( ) == TriggerCondition.ONCLICK_LITERAL
									|| tg.getAction( ).getType( ) == ActionType.HIGHLIGHT_LITERAL )
							{
								customed = true;
							}
						}
						if ( !customed )
						{
							buildinTg = TriggerImpl.create( TriggerCondition.ONCLICK_LITERAL,
									ActionImpl.create( ActionType.HIGHLIGHT_LITERAL,
											SeriesValueImpl.create( String.valueOf( se.getSeriesIdentifier( ) ) ) ) );
						}
						break;
					case LegendBehaviorType.TOGGLE_SERIE_VISIBILITY :
						for ( Iterator itr = elTriggers.iterator( ); itr.hasNext( ); )
						{
							tg = (Trigger) itr.next( );
							if ( tg.getCondition( ) == TriggerCondition.ONCLICK_LITERAL
									|| tg.getAction( ).getType( ) == ActionType.TOGGLE_VISIBILITY_LITERAL )
							{