malloc free

[jamesbankkkk]

for the iterator, when malloc a ptr to iterator, we should use (list_iterator_t **ptr)to destroy, because
void
list_iterator_destroy(list_iterator_t *self) {
LIST_FREE(self);
self = NULL;
}

this is not save, because the
if (val == node->val) {
list_iterator_destroy(it);
return node;
}
it still ptr the memory of free

we should use list_iterator_destory(&it);

[stephenmathieson]

PR welcome! =)

[jamesbankkkk]

every good

[jamesbankkkk]

my colleague said that is the end of code, so can do

[jamesbankkkk]

why in another place, at the list_iterator_destroy(..){LIST_FREE(self); self = null;} why you use null,