ngie e302a523e6 Don't call snmp_pdu_free(..) until finished with the pdu and when ready to
allocate a new one via snmp_pdu_create(..)

This fixes bsnmpwalk, so it no longer crashes after r310729

X-MFC with:	r310729
MFC after:	12 days
2016-12-31 09:43:35 +00:00
..
2016-05-15 00:08:09 +00:00