Index: nodeaccess_userreference.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/nodeaccess_userreference/nodeaccess_userreference.module,v
retrieving revision 1.1.2.6.2.6
diff -u -p -r1.1.2.6.2.6 nodeaccess_userreference.module
--- nodeaccess_userreference.module	9 May 2009 01:52:50 -0000	1.1.2.6.2.6
+++ nodeaccess_userreference.module	14 May 2009 21:05:07 -0000
@@ -150,6 +150,8 @@ function nodeaccess_userreference_node_a
     }
   }
   if (!empty($grants)) {
+    // Allow other modules to change the grants.
+    drupal_alter('nodeaccess_userreference_grants', $grants, $node);
     return $grants;
   }
   return NULL;