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/DifferenceSeriesAttributeComposite.java
private void placeComponents( )
	{
		
		GridLayout glContent = new GridLayout( 2, false );
		glContent.marginHeight = 2;
		glContent.marginWidth = 2;
		
		this.setLayout( glContent );
		
		Group grpLine = new Group( this, SWT.NONE );
		{
			GridLayout glGroup = new GridLayout( 2, true );
			glGroup.horizontalSpacing = 5;
			grpLine.setLayout( glGroup );
			grpLine.setLayoutData( new GridData( GridData.FILL_BOTH ) );
			grpLine.setText( Messages.getString( "DifferenceSeriesAttributeComposite.Lbl.Line" ) ); 
		}
		grpLine1 = new Group( grpLine, SWT.NONE );
		{
			GridData gdGRPLine = new GridData( GridData.FILL_BOTH );
			grpLine1.setLayout( new FillLayout( ) );
			grpLine1.setLayoutData( gdGRPLine );
			grpLine1.setText( Messages.getString( "DifferenceSeriesAttributeComposite.Lbl.PositiveLine" ) ); 
		}
		liacLine1 = new LineAttributesComposite( grpLine1,
				SWT.NONE,
				context,
				( (DifferenceSeries) series ).getLineAttributes( ),
				true,
				true,