s7 enumerate Read_SZL defined twice

[stze]

I've noticed that the same packet is defined twice in the s7-enumerate.nse script.

 -- setup the Read SZL information packet
  local Read_SZL = bin.pack("H", "0300002102f080320700000000000800080001120411440100ff09000400110001")
  -- setup the first SZL request (gather the basic hardware and version number)
  local first_SZL_Request = bin.pack("H", "0300002102f080320700000000000800080001120411440100ff09000400110001")
  -- setup the second SZL request

variable Read_SZL is the same as first_SZL_Request. Maybe the script code is easier to read with only one local variable.