(c-emacs-features): Check beginning-of-defun-raw instead of

beginning-of-defun, and avoid moving point during the test.

lisp/progmodes/cc-defs.el

@@ -1440,13 +1440,14 @@ non-nil, a caret is prepended to invert the set."
 			 '1-bit)
 		       list)))
 
-    ;; In Emacs >= 23, beginning-of-defun will passes its parameter to
-    ;; beginning-of-defun-function.  Assume end-of-defun does the same.
+    ;; In Emacs >= 23, beginning-of-defun-raw passes its argument to
+    ;; beginning-of-defun-function.  Assume end-of-defun does likewise.
     (let ((beginning-of-defun-function
 	   (lambda (&optional arg)
 	     (not (eq arg nil)))))
-      (if (beginning-of-defun 1)
-	  (setq list (cons 'argumentative-bod-function list))))
+      (save-excursion
+	(if (beginning-of-defun-raw 1)
+	    (setq list (cons 'argumentative-bod-function list)))))
 
     (let ((buf (generate-new-buffer " test"))
 	  parse-sexp-lookup-properties