fitters.py: uncommented no guesses in multifit exception
fitters.py: uncommented no guesses in multifit exception

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