Updated symbiosis-firewall-whitelist not to fail.

firewall/sbin/symbiosis-firewall-whitelist

@@ -226,6 +226,11 @@ Symbiosis::Utmp.read(wtmp_file).each do |entry|
   #
   next unless entry['type'] == 7
 
+  #
+  # Fetch the time the entry was logged at.
+  #
+  at = entry['time']
+
   #
   # Make sure the entry isn't in the future
   #