added old fix that avoids ode solver problems with piecewise constant hamiltonins
added old fix that avoids ode solver problems with piecewise constant hamiltonins

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