COMP: Added line accidentally removed.

auto_ptr.hxx.in

@@ -50,6 +50,7 @@ public:
   auto_ptr(auto_ptr_ref<X> r) throw(): x_(r.p_.release()) {}
   template <class Y> operator auto_ptr_ref<Y>() throw() { return auto_ptr_ref<Y>(*this); }
   template <class Y> operator auto_ptr<Y>() throw() { return release(); }
+  auto_ptr& operator=(auto_ptr_ref<X> r) throw() { x_ = r.p_.release(); return *this; }
 };
 
 } // namespace @KWSYS_NAMESPACE@