Merge pull request #530 from moisseev/patch-1

Unbreak bad_hosts check

src/plugins/lua/once_received.lua

@@ -79,8 +79,9 @@ local function check_quantity_received (task)
       return
     end
 
+    local hn = nil
     if r['real_hostname'] then
-      local hn = string.lower(r['real_hostname'])
+      hn = string.lower(r['real_hostname'])
       -- Check for good hostname
       if hn and good_hosts then
         for _,gh in ipairs(good_hosts) do