ZF-7508: Zend_Translate::isTranslated() should not log if untranslated
I've noticed that the isTranslated() method also adds an entry to the log is the messageId is not found. But is seems to be more convenient when only the translate() method would log an untranslated method. Now I'm getting entries in my log when I was only trying to find out if a messageId exists.
Zend_Translated::isTranslated() should only return a Boolean, no more, no less.