Description of problem:

While using the perl SNMP module provided with net-snmp with
asynchronous callbacks it does not always return correctly the OID for
an snmp getnext query (it does return the value though). The attached
patch fixes this... the problem lies in the fact that the numerical
oid is set in an old fashion (or just set differently by the original
writer of that particular piece of code) compared to how it's done in
the rest of the SNMP.xs module.