* Allows zero key/value placeholders in `iwstree_iter_next()` (iwstree.h)
* Allows zero key/value placeholders in `iwstree_iter_next()` (iwstree.h)

Softmotions/iowow,Softmotions/iowow,Softmotions/iowow,Softmotions/iowow,Softmotions/iowow