Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HighlightRuleBuilder.java
private String getFontFamily( )
	{
		String rfm = getRawFontFamily( );
		if ( rfm == null )
		{
			if ( designHandle != null )
			{
				if ( designHandle instanceof StyleHandle )
				{
					rfm = ( (StyleHandle) designHandle ).getFontFamilyHandle( )
							.getStringValue( );
				}
				else
				{
					rfm = designHandle.getPrivateStyle( )
							.getFontFamilyHandle( )
							.getStringValue( );
				}
			}
			else
			{
				rfm = DesignChoiceConstants.FONT_FAMILY_SERIF;
			}
		}
		return HighlightHandleProvider.getFontFamily( rfm );
	}
	private String getRawFontFamily( )