test/smoke: no panic when unable to get exit code
test/smoke: no panic when unable to get exit code

- This was based on a faulty earlier assumption, other code
  already updated to match.

samsalisbury/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,samsalisbury/sous,opentable/sous,opentable/sous,opentable/sous