BRUSSELS — A debate over how far OLAF can go in searching the European Parliament is putting the reputation of both institutions on the line, the head of the EU anti-fraud body has warned. Petr Klement, OLAF’s new director general , said the watchdog is still struggling to get the access it needs to properly investigate alleged wrongdoing in the institution, and called for greater clarity over the powers of investigators. “This is subject to an ongoing legal debate — the extent to which OLAF