Fixes: debbugs:12108

* buff-menu.el (list-buffers-noselect): Use prefix-numeric-value.

lisp/ChangeLog

+2012-07-31  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* buff-menu.el (list-buffers-noselect): Use prefix-numeric-value.
+	(Bug#12108)
+
 2012-07-31  Jay Belanger  <jay.p.belanger@gmail.com>
 	* calc-mode.el (calc-basic-simplification-mode): Rename from

lisp/buff-menu.el

@@ -564,7 +564,8 @@ means list those buffers and no others."
 	(buffer (get-buffer-create "*Buffer List*")))
     (with-current-buffer buffer
       (Buffer-menu-mode)
-      (setq Buffer-menu-files-only (and files-only (>= files-only 0)))
+      (setq Buffer-menu-files-only
+	    (and files-only (>= (prefix-numeric-value files-only) 0)))
       (list-buffers--refresh buffer-list old-buffer)
       (tabulated-list-print))
     buffer))