Handle nil suricata event_stats

[alexolivan]

What would you like to add or change?:
Handle eventual nit event_stats value on suricata.lua script (line 157)

   external_stats.signatures_loaded = 0
   external_stats.signatures_failed = 0

   if event_stats ~= nil then
      external_stats.capture_packets = 0
      external_stats.capture_drops = 0
   else
      external_stats.capture_packets = (event_stats.capture.kernel_packets - event_stats.capture.kernel_drops)
      external_stats.capture_drops = event_stats.capture.kernel_drops

      for _, engine in ipairs(event_stats.detect.engines) do
         external_stats.signatures_loaded = external_stats.signatures_loaded + engine.rules_loaded
         external_stats.signatures_failed = external_stats.signatures_failed + engine.rules_failed
      end
   end

Why do you and others need this?:
Log gets quite an amount of 'noise' due to this script failing from time to time

[lucaderi]

This is odd. I have added an extra check but I am not sure it helps. Please update to the new version (packages will be built in about 1h from now and report)

[cardigliano]

Closing (no feedback, likely fixed)