Lua 5.2 upgrade [1] for NSE.

[1] http://seclists.org/nmap-dev/2012/q2/34

scripts/dpap-brute.nse

@@ -1,3 +1,9 @@
+local base64 = require "base64"
+local brute = require "brute"
+local creds = require "creds"
+local nmap = require "nmap"
+local shortport = require "shortport"
+
 description = [[
 Performs brute force password auditing against an iPhoto Library.
 ]]
@@ -24,10 +30,6 @@ author = "Patrik Karlsson"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"intrusive", "brute"}
 
-require("base64")
-require("shortport")
-require("brute")
-require("creds")
 
 portrule = shortport.port_or_service(8770, "apple-iphoto")