Fix typo in database function log_session_user

config/Windows/navigation.xml

 			var query = new QSqlQuery;
 			query.exec("ALTER TABLE transactions ADD COLUMN person text DEFAULT NULL");
 			query.exec("ALTER TABLE roasting_log ADD COLUMN person text DEFAULT NULL");
-			query.exec("CREATE OR REPLACE FUNCTION log_session_user() RETURNS trigger AS $$ BEGIN NEW.person := session_name; RETURN NEW; END; $$ LANGUAGE plpgsql");
+			query.exec("CREATE OR REPLACE FUNCTION log_session_user() RETURNS trigger AS $$ BEGIN NEW.person := session_user; RETURN NEW; END; $$ LANGUAGE plpgsql");
 			query.exec("CREATE TRIGGER log_person BEFORE INSERT ON inventory FOR EACH ROW EXECUTE PROCEDURE log_session_user()");
 			query.exec("CREATE TRIGGER log_person BEFORE INSERT ON loss FOR EACH ROW EXECUTE PROCEDURE log_session_user()");
 			query.exec("CREATE TRIGGER log_person BEFORE INSERT ON make FOR EACH ROW EXECUTE PROCEDURE log_session_user()");