Bug 315366 "Auto" for Curve Fitting Line is not black but transparent
Description: "Auto" for Curve Fitting Line is not black but transparent. Build number: 2.6.0.v20100602-0949 Steps to reproduce: 1. New a chart, in Format Chart->Series->Value (Y) Series, tick "Shown Curve Fitting Line", click "Curve Fitting Line" button. 2. Select "Auto" for Color. Expected result: The line is shown with color black. Actual result: The line disappears. Error log: N/A
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/series/GanttSeriesAttributeComposite.java
gliacGantt = new GanttLineAttributesComposite( grpLine,
				context,
				SWT.NONE,
				series.getConnectionLine( ),
				true,
				true,
				true );
		gliacGantt.setLayoutData(  new GridData( GridData.FILL_HORIZONTAL ) );
		gliacGantt.addListener( this );
		
		btnPalette = new Button( grpLine, SWT.CHECK );
		{
			GridData gd = new GridData( GridData.FILL_HORIZONTAL );
			gd.horizontalIndent = 4;
			btnPalette.setLayoutData( gd );
			btnPalette.setText( Messages.getString( "GanttSeriesAttributeComposite.Lbl.LinePalette" ) ); 
			btnPalette.setSelection( series.isPaletteLineColor( ) );
			btnPalette.addSelectionListener( this );
		}
		
		grpOutline = new Group( cmpGroup, SWT.NONE );
		GridData gdGRPOutline = new GridData( GridData.FILL_BOTH );
		grpOutline.setLayout( new FillLayout( ) );
		grpOutline.setLayoutData( gdGRPOutline );
		grpOutline.setText( Messages.getString( "GanttSeriesAttributeComposite.Lbl.Outline" ) ); 
		oliacGantt = new LineAttributesComposite( grpOutline,
				SWT.NONE,
				context,
				series.getOutline( ),
				true,