attempt to fix issue with empty dims entries. related to issue #28
attempt to fix issue with empty dims entries. related to issue #28

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