message: Avoid returning uninitialized allocator
diff: @@ -246,9 +246,8 @@ __host__ __device__
  >::type
  system(Alloc &)
  {
  - // return a copy of a default-constructed system
  - typename allocator_system<Alloc>::type result;
  - return result;
  + // return a copy of a value-initialized system
  + return typename allocator_system<Alloc>::type();
  }
  