tfrc: Fix loss event rate computation
tfrc: Fix loss event rate computation

shadeslayer/farstream,tieto/farstream,kakaroto/farstream,shadeslayer/farstream,tieto/farstream,kakaroto/farstream,shadeslayer/farstream,tieto/farstream,kakaroto/farstream,pexip/farstream,pexip/farstream,shadeslayer/farstream,pexip/farstream,pexip/farstream,tieto/farstream,kakaroto/farstream,tieto/farstream