* lisp/arc-mode.el (archive-7z-extract, archive-7z-expunge)

(archive-7z-update): Avoid custom type mismatches.

lisp/ChangeLog

 2013-11-13  Glenn Morris  <rgm@gnu.org>
 
+	* arc-mode.el (archive-7z-extract, archive-7z-expunge)
+	(archive-7z-update): Avoid custom type mismatches.
+
 	* vc/vc.el (vc-diff-knows-L): Remove; unused since 2007-10-10.
 
 2013-11-13  Michael Albinus  <michael.albinus@gmx.de>

lisp/arc-mode.el

 ;;; arc-mode.el --- simple editing of archives
 
-;; Copyright (C) 1995, 1997-1998, 2001-2013 Free Software Foundation,
-;; Inc.
+;; Copyright (C) 1995, 1997-1998, 2001-2013 Free Software Foundation, Inc.
 
 ;; Author: Morten Welinder <terra@gnu.org>
 ;; Keywords: files archives msdog editing major-mode
@@ -326,7 +325,7 @@ Archive and member name will be added."
 ;; 7z archive configuration
 
 (defcustom archive-7z-extract
-  `(,archive-7z-program "x" "-so")
+  `(,(or archive-7z-program "7z") "x" "-so")
   "Program and its options to run in order to extract a 7z file member.
 Extraction should happen to standard output.  Archive and member name will
 be added."
@@ -338,7 +337,7 @@ be added."
   :group 'archive-7z)
 
 (defcustom archive-7z-expunge
-  `(,archive-7z-program "d")
+  `(,(or archive-7z-program "7z") "d")
   "Program and its options to run in order to delete 7z file members.
 Archive and member names will be added."
   :version "24.1"
@@ -349,7 +348,7 @@ Archive and member names will be added."
   :group 'archive-7z)
 
 (defcustom archive-7z-update
-  `(,archive-7z-program "u")
+  `(,(or archive-7z-program "7z") "u")
   "Program and its options to run in order to update a 7z file member.
 Options should ensure that specified directory will be put into the 7z
 file.  Archive and member name will be added."