quick fix for build warning which will cause build error,the reason is caused...

quick fix for build warning which will cause build error,the reason is caused by forget one template parameter check type mismatch

src/lib/datasrc/rbtree.h

@@ -599,7 +599,7 @@ RBTree<T,S>::find(const isc::dns::Name& name, const RBNode<T>** node,
 {
     const RBNode<T>* up_node;
     RBNode<T>* target_node;
-    const typename RBTree<T>::Result ret =
+    const typename RBTree<T,S>::Result ret =
         findHelper(name, &up_node, &target_node, callback, callback_arg);
     if (ret != NOTFOUND) {
         *node = target_node;
@@ -619,7 +619,7 @@ RBTree<T,returnEmptyNode>::findHelper(const isc::dns::Name& target_name,
     using namespace helper;
 
     RBNode<T>* node = root_;
-    typename RBTree<T>::Result ret = NOTFOUND;
+    typename RBTree<T,returnEmptyNode>::Result ret = NOTFOUND;
     *up_node = NULLNODE;
     isc::dns::Name name = target_name;
 
@@ -643,7 +643,7 @@ RBTree<T,returnEmptyNode>::findHelper(const isc::dns::Name& target_name,
                     node->left_ : node->right_;
             } else if (relation == isc::dns::NameComparisonResult::SUBDOMAIN) {
                 if (returnEmptyNode || !node->isEmpty()) {
-                    ret = RBTree<T>::PARTIALMATCH;
+                    ret = RBTree<T,returnEmptyNode>::PARTIALMATCH;
                     *target = node;
                     if (callback != NULL && node->callback_required_) {
                         if ((callback)(*node, callback_arg)) {