[NSE] Undeclared variable in dns.processResponse()

[Ron <ron () skullsecurity net>]

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Hey,

While writing some sample code for the DNS library, I wrote the following code:
  local status, result = dns.query('www.obscuredomain.com', {norecurse=true})

It generates the following error:
./nselib/strict.lua:65: variable 'host' is not declared
stack traceback:
        [C]: in function 'error'
        ./nselib/strict.lua:69: in function <./nselib/strict.lua:60>
        ./nselib/strict.lua:65: in function <./nselib/strict.lua:60>
        ./nselib/dns.lua:198: in function <./nselib/dns.lua:175>

The line number's going to be wrong because I'm modifying dns.lua right now, but this is the line:

       -- only ask next server in authority, if 
       -- we got an auth dns and
       -- it isn't the one we just asked
       if next_server and next_server ~= host and options.tries > 1 then   -- <---------- THIS LINE
          options.host = next_server
          options.tries = option.tries - 1
          return query(dname, options)
       end

I don't know the code well enough to fix it myself with any confidence, but I'm guessing that 'host' simply needs to be 
changed to 'options.host'. 

Can somebody more familiar with the code confirm?

Thanks!

Ron
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