Fix bug#5395: typing '#' in an empty C buffer throws "args out of range".

* progmodes/cc-defs.el: (c-set-cpp-delimiters, c-clear-cpp-delimiters):
Check for EOB playing the role of delimiter.

lisp/ChangeLog

+2010-01-19  Alan Mackenzie  <acm@muc.de>
+
+	* progmodes/cc-defs.el: Fix bug#5395: typing '#' in an empty
+	buffer throws "args out of range".
+	(c-set-cpp-delimiters, c-clear-cpp-delimiters): Check for EOB
+	playing the role of delimiter.
+
 2010-01-18  Stephen Leake  <stephen_leake@member.fsf.org>
 
 	* lisp/progmodes/ada-mode.el: Fix bug#5400.

lisp/progmodes/cc-defs.el

@@ -1217,12 +1217,14 @@ been put there by c-put-char-property.  POINT remains unchanged."
   ;; This macro does a hidden buffer change.
   `(progn
      (c-put-char-property ,beg 'category 'c-cpp-delimiter)
-     (c-put-char-property ,end 'category 'c-cpp-delimiter)))
+     (if (< ,end (point-max))
+	 (c-put-char-property ,end 'category 'c-cpp-delimiter))))
 (defmacro c-clear-cpp-delimiters (beg end)
   ;; This macro does a hidden buffer change.
   `(progn
      (c-clear-char-property ,beg 'category)
-     (c-clear-char-property ,end 'category)))
+     (if (< ,end (point-max))
+	 (c-clear-char-property ,end 'category))))
 
 (defsubst c-comment-out-cpps ()
   ;; Render all preprocessor constructs syntactically commented out.