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/PieSeriesAttributeComposite.java
GridLayout gridLayout = new GridLayout( 3, false );
			gridLayout.marginWidth = 0;
			GridData gd = new GridData( GridData.FILL_BOTH );
			gd.horizontalSpan = 3;
			grpSlice.setLayoutData( gd );
			grpSlice.setLayout( gridLayout );
			grpSlice.setText( Messages.getString("PieSeriesAttributeComposite.Grp.Slice") );
		}
		lblExpSliWhen = new Label( grpSlice, SWT.NONE );
		{
			lblExpSliWhen.setText( Messages.getString( "PieBottomAreaComponent.Label.ExplodeSliceWhen" ) ); 
			lblExpSliWhen.setToolTipText( TOOLTIP_EXPLODE_SLICE_WHEN );
		}
		txtExplode = new TextEditorComposite( grpSlice, SWT.BORDER
				| SWT.SINGLE );
		{
			GridData gd = new GridData( GridData.FILL_HORIZONTAL );
			txtExplode.setLayoutData( gd );
			if ( series.getExplosionExpression( ) != null )
			{
				txtExplode.setText( series.getExplosionExpression( ) );
			}
			txtExplode.setToolTipText( Messages.getString( "PieBaseSeriesComponent.Tooltip.EnterBooleanExpression" ) ); 
			txtExplode.addListener( this );
		}
		btnBuilder = new Button( grpSlice, SWT.PUSH );
		{
			GridData gdBTNBuilder = new GridData( );
			gdBTNBuilder.heightHint = 20;
			gdBTNBuilder.widthHint = 20;