[libcxx] [test] Avoid -Wunused-local-typedef in node_handle.pass.cpp.

llvm-svn: 339218
diff --git a/libcxx/test/std/containers/container.node/node_handle.pass.cpp b/libcxx/test/std/containers/container.node/node_handle.pass.cpp
index 6314ec1..1c815a4 100644
--- a/libcxx/test/std/containers/container.node/node_handle.pass.cpp
+++ b/libcxx/test/std/containers/container.node/node_handle.pass.cpp
@@ -121,10 +121,12 @@
     assert(nt2.empty());
 }
 
+template <class> void test_typedef() {}
+
 template <class Container>
 void test_insert_return_type()
 {
-    using irt_type = typename Container::insert_return_type;
+    test_typedef<typename Container::insert_return_type>();
 }
 
 int main()