Tidy failure cases for PIR implementation of t/pmc/ro.t

[bobw]

When an expected failure occurs the subs should then go to the end of the sub, rather than continuing through the error handlers (which are expected to be invoked).

bob@eeepcenc:~/src/parrot$ diffstat t/pmc/ro.t.patch

ro.t | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)

bob@eeepcenc:~/src/parrot$

[bobw]

a patch for t/pmc/ro.t

[bubaflub]

Applied in r45405.