RR(XS): JDK-8028408 unused-value warning on forte.cpp when build on Mac

[Dmitry Samersoff]

Please, review one-line fix

http://cr.openjdk.java.net/~dsamersoff/JDK-8028408/webrev.01/


-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.