fixed typo when defining elpetro_absmag_colour_X_Y
fixed typo when defining elpetro_absmag_colour_X_Y

sdss/marvin,albireox/marvin,sdss/marvin,albireox/marvin,bretthandrews/marvin,bretthandrews/marvin,bretthandrews/marvin,albireox/marvin,sdss/marvin,bretthandrews/marvin,sdss/marvin,albireox/marvin