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/util/ChartUtil.java
* @param source
	 * @return
	 */
	public static void mergeFont( FontDefinition original, FontDefinition source )
	{
		if ( source != null )
		{
			if ( original.getAlignment( ) == null )
			{
				original.setAlignment( source.getAlignment( ) );
			}
			else if ( !original.getAlignment( ).isSetHorizontalAlignment( )
					&& source.getAlignment( ) != null )
			{
				original.getAlignment( )
						.setHorizontalAlignment( source.getAlignment( )
								.getHorizontalAlignment( ) );
			}
			if ( original.getName( ) == null )
			{
				original.setName( source.getName( ) );
			}
			if ( !original.isSetBold( ) )
			{
				original.setBold( source.isBold( ) );
			}
			if ( !original.isSetItalic( ) )
			{
				original.setItalic( source.isItalic( ) );
			}