Loading a checkpointed model

Hello. Thanks so much for working in this project.

I a running into an issue when loading the checkpointed model. I get the floowing error after running `python main.py --dataset cnn --forward_only True`

```
File "main.py", line 49, in
tf.app.run()
File "/usr/local/lib/python2.7/site-packages/tensorflow/python/platform/default/_app.py", line 30, in run
sys.exit(main(sys.argv))
File "main.py", line 46, in main
model.load(sess, FLAGS.checkpoint_dir, FLAGS.dataset)
File "/Users/raphaelabberbock/Desktop/junk/attentive2/model/base_model.py", line 29, in load
self.saver = tf.train.Saver()
File "/usr/local/lib/python2.7/site-packages/tensorflow/python/training/saver.py", line 705, in __init__
raise ValueError("No variables to save")
ValueError: No variables to save
```

An issue has already been opened regarding this matter, but I did not see a resolution to the problem.

Any help would be much appreciated.

Thanks,

Raffi