Don't fall on NullPointerException if returned EventUser is null.

code/moya-beans/ejbModule/fi/codecrew/moya/beans/UserBean.java

@@ -1143,11 +1143,13 @@ public class UserBean implements UserBeanLocal {
 		EventUser eventUser = eventUserFacade.findByTokenCode(code);
 
 		// Event mismatch?
+		if (eventUser != null) {
 			Integer eventId = eventUser.getEvent().getId();
 			Integer currentEventId = eventBean.getCurrentEvent().getId();
 			if (eventId != currentEventId) {
 				throw new IllegalStateException("Looked up code " + code + " and got EventUser " + eventUser.getId() + " from event " + eventId + " which is not the current event " + currentEventId);
 			}
+		}
 
 		return eventUser;
 	}