Create initial_state tensor filled with zeros without use of K.zeros (#3123)
Create initial_state tensor filled with zeros without use of K.zeros (#3123)

* Create initial_state tensor filled with zeros without use of K.zeros

* minor PEP8 fix

dolaameng/keras,keras-team/keras,DeepGnosis/keras,kuza55/keras,kemaswill/keras,keras-team/keras,nebw/keras,relh/keras