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Lua compare nil with number ??

DedicatedOT

DedicatedOT

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Code: 
[15/06/2009 21:39:20] data/npc/scripts/pet reviver.lua:onCreatureSay

[15/06/2009 21:39:20] data/npc/scripts/pet reviver.lua:41: attempt to compare nil with number
[15/06/2009 21:39:20] stack traceback:
[15/06/2009 21:39:20] 	data/npc/scripts/pet reviver.lua:41: in function <data/npc/scripts/pet reviver.lua:39>

Code: 
function onCreatureSay(cid, type, msg)
      msg = string.lower(msg)
    if getDistanceToCreature(cid) < 4 then  // line 41
          if (msgcontains(msg, 'hi') and (focus == 0)) then
              selfSay('Hello ' .. creatureGetName(cid) .. '! I can take you to the train!')
                focus = cid
                talk_start = os.clock()
 
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