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 Axis axPrimaryBase = ( (ChartWithAxes) cm ).getBaseAxes( )[0];
					if ( axPrimaryBase.getSeriesDefinitions( ).isEmpty( ) )
					{
						
						
						return;
					}
					
					sdBase = (SeriesDefinition) axPrimaryBase.getSeriesDefinitions( )
							.get( 0 );
				}
				else if ( cm instanceof ChartWithoutAxes )
				{
					if ( ( (ChartWithoutAxes) cm ).getSeriesDefinitions( )
							.isEmpty( ) )
					{
						
						
						return;
					}
					
					sdBase = (SeriesDefinition) ( (ChartWithoutAxes) cm ).getSeriesDefinitions( )
							.get( 0 );
				}
				
				seBase = (Series) sdBase.getRunTimeSeries( ).get( 0 );
				pa = sdBase.getSeriesPalette( );
				elPaletteEntries = pa.getEntries( );
				iPaletteCount = elPaletteEntries.size( );
				if ( lilh.getLegendItemHints( ) == null )