Useless assigning buf[3] to buf[3];
if (params->in_has_alpha)
buf[3] = buf[3];
https://gitlab.gnome.org/GNOME/gegl/-/blob/master/operations/common-gpl3+/bump-map.c#L243
if (params->in_has_alpha)
buf[3] = buf[3];
https://gitlab.gnome.org/GNOME/gegl/-/blob/master/operations/common-gpl3+/bump-map.c#L243