Bug 123736 Underline, linethrough, overline doesn't work for chart font.
Description: Underline, linethrough, overline doesn't work for chart font. Steps to teproduce: 1. Add a style, set its font. 2. Tick "underline", "linethrough" and "overline". 3. Preview. Font setting doesn't work.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/factory/Generator.java
RunTimeContext rtc = new RunTimeContext( );
		rtc.setScriptClassLoader( iscl );
		
		final Chart cmRunTime = (Chart) EcoreUtil.copy( model );
		rtc.setLocale( Locale.getDefault( ) );
		ChartScriptContext csc = new ChartScriptContext( );
		csc.setChartInstance( cmRunTime );
		csc.setExternalContext( externalContext );
		csc.setLocale( rtc.getLocale( ) );
		csc.setLogger( logger );
		rtc.setScriptContext( csc );
		ScriptHandler sh = new ScriptHandler( );
		rtc.setScriptHandler( sh );
		
		sh.setScriptClassLoader( iscl );
		
		try
		{
			if ( externalContext != null
					&& externalContext.getScriptable( ) != null )
			{
				sh.init( externalContext.getScriptable( ) );
			}
			else
			{
				sh.init( null );
			}
			sh.setRunTimeModel( cmRunTime );
			final String sScriptContent = cmRunTime.getScript( );
			if ( sScriptContent != null )