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
Label lblLeaderStyle = new Label( cmpStyle, SWT.NONE );
		GridData gdLBLLeaderStyle = new GridData( );
		lblLeaderStyle.setLayoutData( gdLBLLeaderStyle );
		lblLeaderStyle.setText( Messages.getString( "PieSeriesAttributeComposite.Lbl.LeaderLineStyle" ) ); 
		cmbLeaderLine = new Combo( cmpStyle, SWT.DROP_DOWN | SWT.READ_ONLY );
		GridData gdCMBLeaderLine = new GridData( GridData.FILL_HORIZONTAL );
		cmbLeaderLine.setLayoutData( gdCMBLeaderLine );
		cmbLeaderLine.addSelectionListener( this );
		
		Label lblLeaderSize = new Label( cmpStyle, SWT.NONE );
		GridData gdLBLLeaderSize = new GridData( );
		lblLeaderSize.setLayoutData( gdLBLLeaderSize );
		lblLeaderSize.setText( Messages.getString( "PieSeriesAttributeComposite.Lbl.LeaderLineLength" ) ); 
		iscLeaderLength = new Spinner( cmpStyle, SWT.BORDER );
		GridData gdISCLeaderLength = new GridData( GridData.FILL_HORIZONTAL );
		iscLeaderLength.setLayoutData( gdISCLeaderLength );
		iscLeaderLength.setMinimum( 0 );
		iscLeaderLength.setMaximum( MAX_LEADER_LENGTH );
		iscLeaderLength.setSelection( (int) series.getLeaderLineLength( ) );
		iscLeaderLength.addSelectionListener( this );
		Composite cmpRight = new Composite( this, SWT.NONE );
		{
			cmpRight.setLayout( new GridLayout( 3, false ) );
			cmpRight.setLayoutData( new GridData( GridData.FILL_BOTH ) );
		}
		createSeriesDetail( cmpRight );
		populateLists( );
	}
	private void createSeriesDetail( Composite cmpRight )