emacs-lisp/package.el (package-delete): Delete package completely

* emacs-lisp/package.el (package-delete): Also delete the package
name from `package-alist', not its description only.

lisp/ChangeLog

+2014-01-07  Bastien Guerry  <bzg@gnu.org>
+
+	* emacs-lisp/package.el (package-delete): Also delete the package
+	name from `package-alist', not its description only.
+
 2014-01-07  Glenn Morris  <rgm@gnu.org>
 
 	* help.el (view-external-packages):

lisp/emacs-lisp/package.el

@@ -1231,7 +1231,7 @@ The file can either be a tar file or an Emacs Lisp file."
 	    (delete-file signed-file)))
       ;; Update package-alist.
       (let* ((name (package-desc-name pkg-desc)))
-        (delete pkg-desc (assq name package-alist)))
+	(delete (delete pkg-desc (assq name package-alist)) package-alist))
       (message "Package `%s' deleted." (package-desc-full-name pkg-desc)))))
 
 (defun package-archive-base (desc)