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Remove indirection for face names

--- rnc-mode-1.0.6/rnc-mode.el
+++ rnc-mode-1.0.6/rnc-mode.el
@@ -156,24 +156,17 @@
              (concat (substring result 0 -2) "\\)"))
       (setq result (concat result op "\\|")))))
 
-;; Font lock treats face names differently in GNU Emacs and XEmacs
-;; The following defvars is a workaround
-
-(defvar italic 'italic)
-(defvar default 'default)
-(defvar font-lock-preprocessor-face 'font-lock-preprocessor-face)
-
 (defvar rnc-font-lock-keywords
   (list
    '("\\b\\(attribute\\|element\\)\\b\\([^{]+\\){" 2 
      font-lock-variable-name-face)
-   '("[a-zA-Z][-a-zA-Z0-9._]*:[a-zA-Z][-a-zA-Z0-9._]*" . italic)
+   '("[a-zA-Z][-a-zA-Z0-9._]*:[a-zA-Z][-a-zA-Z0-9._]*" . 'italic)
    '("\\b\\(default\\(\\s +namespace\\)?\\|namespace\\|datatypes\\)\\(\\s +[a-zA-Z][-a-zA-Z0-9._]*\\)?\\s *=" 1 font-lock-preprocessor-face)
    '("\\([a-zA-Z][-a-zA-Z0-9._]*\\)\\(\\s \\|\n\\)*[|&]?=" 1 
      font-lock-function-name-face)
-   '("[a-zA-Z][a-zA-Z0-9._]*\\(-[a-zA-Z][a-zA-Z0-9._]*\\)+" . default)
-   (cons (rnc-make-regexp-choice rnc-atoms) 'italic)
-   (cons (rnc-make-regexp-choice rnc-keywords) font-lock-keyword-face)
+   '("[a-zA-Z][a-zA-Z0-9._]*\\(-[a-zA-Z][a-zA-Z0-9._]*\\)+" . 'default)
+   (cons (rnc-make-regexp-choice rnc-atoms) ''italic)
+   (cons (rnc-make-regexp-choice rnc-keywords) 'font-lock-keyword-face)
    )
   "RNC Highlighting")