zimsplit create surnumerous empty chunk

[kelson42]

$wget https://github.com/orgs/openzim/repositories
$zimsplit wikipedia_ar_all_nopic_2024-04.zim
$rm wikipedia_ar_all_nopic_2024-04.zim
$ ls -la wikipedia_ar_all_nopic_2024-04.zim*
-rw-rw-r-- 1 kelson kelson 2147427173 Apr 20 14:38 wikipedia_ar_all_nopic_2024-04.zimaa
-rw-rw-r-- 1 kelson kelson 2147390374 Apr 20 14:38 wikipedia_ar_all_nopic_2024-04.zimab
-rw-rw-r-- 1 kelson kelson 1313881993 Apr 20 14:38 wikipedia_ar_all_nopic_2024-04.zimac
-rw-rw-r-- 1 kelson kelson 3174941497 Apr 20 14:38 wikipedia_ar_all_nopic_2024-04.zimad
-rw-rw-r-- 1 kelson kelson          0 Apr 20 14:38 wikipedia_ar_all_nopic_2024-04.zimae

wikipedia_ar_all_nopic_2024-04.zimae been fully empty, it should not have been created!

Reported first there