
Some of the new JXL backgrounds from gnome-backgrounds can allocate several hundred MB during loading, so let's call malloc_trim() after we are done with loading the image into a pixbuf. Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3327 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3653>