Font slants

[Chong Yidong]

When I do M-x customize-face RET default RET, the value of the `default'
face is given as a Lisp expression instead of the usual value menus.
This occurs because the slant of the face, as supplied by the new font
engine, is "roman".

I just committed the following patch to fix this.  However, I'm not sure
these are the only values of the slant parameter.  Does anyone know if
other possible values could be generated?


*** trunk/lisp/cus-face.el.~1.53.~      2008-03-14 13:42:17.000000000 -0400
--- trunk/lisp/cus-face.el      2008-04-05 10:42:06.000000000 -0400
***************
*** 120,126 ****
             :value normal              ; default
             (const :tag "italic" italic)
             (const :tag "oblique" oblique)
!            (const :tag "normal" normal)))
  
      (:underline
       (choice :tag "Underline"
--- 120,127 ----
             :value normal              ; default
             (const :tag "italic" italic)
             (const :tag "oblique" oblique)
!            (const :tag "normal" normal)
!            (const :tag "roman" roman)))
  
      (:underline
       (choice :tag "Underline"