fix bug 'dtype' is an invalid keyword to ones_like
fix bug 'dtype' is an invalid keyword to ones_like

qutip/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip,zasdfgbnm/qutip,cgranade/qutip,cgranade/qutip,anubhavvardhan/qutip,qutip/qutip