Do not print bogus response code (Fixes BUGZ-4201)

Begin arcbot message
This merge request is automatically cherrypicked from !1778 (merged) from source branch https://source.coderefinery.org/lars_t_hansen/arc/-/tree/larstha-4201-response-code orginally made by @lars_t_hansen .
The original MR went to branch: https://source.coderefinery.org/nordugrid/arc/-/tree/master
End arcbot message

Under certain conditions the value of an uninitialized field of the info structure will be printed. Don't do that.