fix bug in deleting last process in workflow order
fix bug in deleting last process in workflow order

simontegg/valuenetwork,django-rea/nrp,thierrymarianne/valuenetwork,django-rea/nrp,valnet/valuenetwork,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,simontegg/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,django-rea/nrp,valnet/valuenetwork,FreedomCoop/valuenetwork,thierrymarianne/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,FreedomCoop/valuenetwork,django-rea/nrp,valnet/valuenetwork,valnet/valuenetwork