Will Gan

Looks like I'm still getting a segfault when hs=0. (Based on the [doc2vec.py:590](https://github.com/RaRe-Technologies/gensim/blob/develop/gensim/models/doc2vec.py), it looks like that is the default, though the [docs](https://radimrehurek.com/gensim/models/doc2vec.html) say it's 1.) ``` def get_doc2vec(): return...