[TT #660] tidy failure cases of t/pmc/ro.t, patch courtesy of bobw++
[TT #660] tidy failure cases of t/pmc/ro.t, patch courtesy of bobw++

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@45405 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot