fix gcc 5.4 warnings

Jan Willamowius

2019-04-22 ee2a290abf16f4fd4736c2f4e17e9cff87f50447

 src/library/base/EventRegistry.cpp

@@ -79,7 +79,7 @@
}

void EventRegistry::addError(EVENT_TYPE event) {
   addEvent(event, SVRT_ERROR);
   this->addEvent(event, SVRT_ERROR);
}

void EventRegistry::addEvent(EVENT_TYPE event, SEVERITY severity) {