fix crash on startup
fix crash on startup

virgo-agent-toolkit/rackspace-monitoring-agent,christopherjwang/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,virgo-agent-toolkit/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,kaustavha/rackspace-monitoring-agent,kaustavha/rackspace-monitoring-agent,christopherjwang/rackspace-monitoring-agent