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
al = seda[j].getRunTimeSeries( );
					pa = seda[j].getSeriesPalette( );
					elPaletteEntries = pa.getEntries( );
					iPaletteCount = elPaletteEntries.size( );
					for ( int i = 0; i < al.size( ); i++ )
					{
						seBase = (Series) al.get( i );
						if ( !seBase.isVisible( ) )
						{
							continue;
						}
						lirh = (LegendItemRenderingHints) htRenderers.get( seBase );
						if ( k < liha.length )
						{
							lih = liha[k++];
							if ( lih.getType( ) == IConstants.LEGEND_ENTRY )
							{
								la.getCaption( ).setValue( lih.getText( ) );
								Label valueLa = null;
								if ( lg.isShowValue( ) )
								{
									valueLa = LabelImpl.copyInstance( seBase.getLabel( ) );
									valueLa.getCaption( )
											.setValue( lih.getExtraText( ) );
									
									
									valueLa.setVisible( true );
								}
								
								fPaletteEntry = (Fill) elPaletteEntries.get( i