*   Fix bug in peephole implementation of BlockLSTM cell.
    *   Fix bug by casting dtype of `log_det_jacobian` to match `log_prob` in
        `TransformedDistribution`.
    *   Fix a bug in `import_meta_graph`'s handling of partitioned variables
        when
    *   Ensure `tf.distributions.Multinomial` doesn't underflow in `log_prob`.
        Before this change, all partitions of an integer variable were