Post mods should use session_host when reporting

target_host probably never worked anyway

modules/post/windows/gather/forensics/duqu_check.rb

@@ -54,7 +54,7 @@ class Metasploit3 < Msf::Post
 					print_good("#{sysinfo['Computer']}: #{path}\\#{query} found in registry.")
 					match += 1
 					report_vuln(
-						:host          => target_host,
+						:host          => session.session_host,
 						:name          => self.fullname,
 						:info          => "#{path}\\#{query} possible CVE-2011-3402 exploitation [Duqu] artifact.",
 						:refs          => self.references,