commit 19e1b breaks fit_generator & flow_from_dictionary

[alicanb]

Here's the gist for a MWE. Runs correctly with Keras built from ab57009 but gives StopIteration: Asked to retrieve element 486, but the Sequence has length 86 on start of second epoch with Keras built from 19e1b (using TF 1.3.0 backend)

[bdwyer2]

Thanks for pointing this out. This issue should be resolved by #8060 403d577

[alicanb]

Yep, closing.