CLASS FITS reader should not have a negative CDELT
CLASS FITS reader should not have a negative CDELT

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