fix permission problem

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
fix typo

fix undefined error reported here.
https://github.com/adrahon/vagrant-kvm/issues/201#issuecomment-40050196

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
Merge pull request #206 from miurahr/fix_bug193_permission_on_master

fix permission problem