found some missing dtype=complex flags for sparse matrix creation
found some missing dtype=complex flags for sparse matrix creation

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