DelayedUpdateTrainer.objective_buffers called twice without variable reuse

[varisd]

Atrribute Method DelayedUpdateTrainer.objective_buffers is being called twice,

once in: https://github.com/ufal/neuralmonkey/blob/master/neuralmonkey/trainers/delayed_update_trainer.py#L156

and second time in: https://github.com/ufal/neuralmonkey/blob/master/neuralmonkey/trainers/delayed_update_trainer.py#L173

There is no explicit specification of the variable reuse so I assume that each class method works with a different list of graph variables. Next time, I recommend using tf.get_variable + proper naming instead of using carelessly using tf.Variable

[jindrahelcl]

self.objective_buffers je @tensor, takže se volá jen jednou.