Add a safe wrapper for cross entropy. #142
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IanTayler
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This fixes an error we were getting when softmax_cross_entropy_with_logits received empty tensors.
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This fixes an error we were getting when
tf.nn.softmax_cross_entropy_with_logitsreceived empty tensors. The error was quite elusive, as it only happened on GPUs and not CPUs. This is the issue as reported over at the TF repo.