bugfix in read_class - wrong type (again)
bugfix in read_class - wrong type (again)

keflavich/pyspeckit,allisony/pyspeckit,keflavich/pyspeckit-obsolete,low-sky/pyspeckit,vlas-sokolov/pyspeckit,e-koch/pyspeckit,dinossimpson/pyspeckit,jpinedaf/pyspeckit,allisony/pyspeckit,low-sky/pyspeckit,dinossimpson/pyspeckit,bsipocz/pyspeckit,jpinedaf/pyspeckit,pyspeckit/pyspeckit,e-koch/pyspeckit,keflavich/pyspeckit,pyspeckit/pyspeckit,bsipocz/pyspeckit,vlas-sokolov/pyspeckit,mikelum/pyspeckit,mikelum/pyspeckit