I don't like it. By choosing to open limp, you've only put 50 bucks in and will have to risk 1200. He raised 1/3 of his stack, therefore, I think your fold equity is 0. You'll be either a slight favorite or a big dog, fold. You have a healthy chipstack and don't need to take gambles like this. Even if you had raised to t150 and he reraised all in, I'd still fold due to your chip position.