vm-summary-deleted-face not well defined for Emacs

The face `vm-summary-deleted-face' is not well defined for Emacs. It's ok for XEmacs but not for Emacs.

See the bug description at http://bugs.gentoo.org/attachment.cgi?id=97140&action=diff

The code that would fix this bug is (in vm-summary-faces.el):

  (defface vm-summary-deleted-face
     (if (featurep 'xemacs)
         '((t (:foreground "grey50" :strikethru t)))
       '((t (:foreground "grey50" :strike-through t))))
     "The face used in VM Summary buffers for deleted messages."
     :group 'vm-summary-faces)