missing typename

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac397@3605 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/auth/rbt_datasrc.h

@@ -396,7 +396,8 @@ RBTree<T>::findHelper(const Name& name, const RBTree<T>** tree,
                     return (node->down_->findHelper(name - node->name_, tree,
                                                     ret));
                 } else {
-                    RBTree<T>::FindResult result = RBTree<T>::NOTFOUND;
+                    typename RBTree<T>::FindResult result =
+                        RBTree<T>::NOTFOUND;
                     if (node->down_ != NULL) {
                         result = node->down_->findHelper(name - node->name_,
                                                          tree, ret);