Avoid Perl warnings in Info::CiscoStack
Avoid Perl warnings in Info::CiscoStack

These two points in CiscoStack use a value from a hash in a numerical
comparison without verifying they exist.  If they don't, Perl warnings get
emitted.  Instead, we check for existence first, then compare the value.

lucwillems/SNMP-INFO,42wim/snmp-info,lucwillems/SNMP-INFO,42wim/snmp-info,lucwillems/SNMP-INFO