
Just in case it was lower before. So that `upload_subregion_to_gl` is not trying to upload to a disallowed mipmap level. https://gitlab.gnome.org/GNOME/mutter/merge_requests/1003
Just in case it was lower before. So that `upload_subregion_to_gl` is not trying to upload to a disallowed mipmap level. https://gitlab.gnome.org/GNOME/mutter/merge_requests/1003