New test case.

From-SVN: r28672

gcc/testsuite/g++.old-deja/g++.pt/typename23.C

+// Build don't link:
+template<class T>
+void value_type(T){}
+
+template <class T>
+struct B{
+  typedef T value_type;
+};
+
+template<class>class Vector{};
+
+template<class T>
+struct D:B<T>{
+  Vector<value_type> r;  // ERROR - value_type is not a type
+};