Check for when reg key list is nil

git-svn-id: file:///home/svn/framework3/trunk@13157 4d416f70-5f16-0410-b530-b9f4589650da

modules/post/windows/gather/enum_applications.rb

@@ -47,8 +47,11 @@ class Metasploit3 < Msf::Post
 			]
 		apps = []
 		appkeys.each do |keyx86|
-			registry_enumkeys(keyx86).each do |ak|
+			found_keys = registry_enumkeys(keyx86)
-				apps << keyx86 +"\\" + ak
+			if found_keys
+				found_keys.each do |ak|
+					apps << keyx86 +"\\" + ak
+				end
 			end
 		end