Exception thrown if inference with batch size other than 1

[mandy-li]

With commit ID 2d8b0cb, if use batch size other than 1 to do inference, an exception will be thrown.

This is the exception I got with batch size 2 for inference:

Traceback (most recent call last):
File "/localdisk/venv_3_31_master/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1337, in _do_call
return fn(*args)
File "/localdisk/venv_3_31_master/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1322, in _run_fn
options, feed_dict, fetch_list, target_list, run_metadata)
File "/localdisk/venv_3_31_master/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1410, in _call_tf_sessionrun
run_metadata)
tensorflow.python.framework.errors_impl.InvalidArgumentError: Incompatible shapes: [8732] vs. [17464]
[[{{node decode_all_anchors/mul_7}}]]