check_hpasm has issues with memory when using SNMPv3

[L-B]

When switching check_hpasm from SNMPv2 to SNMPv3, it stops working properly: there are two uninitialized variables errors.
The SNMP target is a Windows 2008 host. The system where check_hpasm is running is on RHEL6. I'm using v4.7.1.1.
snmpwalk works fine using either version of the protocol, and I don't see any obvious differences between the results.

$ /usr/lib64/nagios/plugins/check_hpasm --protocol=3  -H server -t 60 --username=user --authpassword=password --privpassword=password --authprotocol=sha --privprotocol=aes 
Use of uninitialized value in numeric lt (<) at /usr/lib64/nagios/plugins/check_hpasm line 2894.
Use of uninitialized value $hpboard in numeric ne (!=) at /usr/lib64/nagios/plugins/check_hpasm line 2900.
WARNING - status of all 0 dimms is n/a (please upgrade firmware), System: 'proliant dl380p gen8', S/N: 'CZxxxxxWN', ROM: 'P70 07/01/2015'