-bug: If there is no snmp session, we should not be attempting a reindex check with snmp.
-bug: If there is no snmp session, we should not be attempting a reindex check with snmp.

git-svn-id: 3890219a24e7187f296b0875efd8ca50fb46dfdb@4979 860744bd-22fc-0310-8c96-e9fe5004b5ca

Cacti/spine,Cacti/spine,Cacti/spine