logits_py incorrect in gumbel_softmax_vae_v2

[backpropper]

logits_py should be the log of the current logits_py or we can just give it as probs and not logits to the corresponding distribution.

[bobxwu]

Hi, do you know the meaning of the APIs log_prob and prob in tf.distributions or tf.contrib.distributions?
They are quite confusing.