Do not worry about key permissions on windows [closes GH-79]

lib/vagrant/ssh.rb

@@ -87,6 +87,8 @@ module Vagrant
     # Checks the file permissions for the private key, resetting them
     # if needed, or on failure erroring.
     def check_key_permissions(key_path)
+      return if Mario::Platform.windows?
+
       # TODO: This only works on unix based systems for now. Windows
       # systems will need to be investigated further.
       stat = File.stat(key_path)

test/vagrant/ssh_test.rb

@@ -203,6 +203,14 @@ class SshTest < Test::Unit::TestCase
       @stat = mock("stat")
       @stat.stubs(:owned?).returns(true)
       File.stubs(:stat).returns(@stat)
+
+      Mario::Platform.stubs(:windows?).returns(false)
+    end
+
+    should "do nothing if on windows" do
+      Mario::Platform.stubs(:windows?).returns(true)
+      File.expects(:stat).never
+      @ssh.check_key_permissions(@key_path)
     end
 
     should "do nothing if the user is not the owner" do