add a missing require for gnus-util

* lisp/org-gnus.el: Add a missing require for gnus-util.

* contrib/lisp/org-contacts.el: Add a missing require for gnus-util.

contrib/lisp/org-contacts.el

@@ -41,6 +41,7 @@
 
 (eval-and-compile
   (require 'org))
+(require 'gnus-util)
 
 (defgroup org-contacts nil
   "Options concerning contacts management."

lisp/org-gnus.el

@@ -32,6 +32,7 @@
 ;;; Code:
 
 (require 'org)
+(require 'gnus-util)
 (eval-when-compile (require 'gnus-sum))
 
 ;; Declare external functions and variables