Function pbase_tree_cache_ix_incr

builtin/pack-objects.c:1927–1930

	return oid->hash[0] % ARRAY_SIZE(pbase_tree_cache);
}
static int pbase_tree_cache_ix_incr(int ix)
{
	return (ix+1) % ARRAY_SIZE(pbase_tree_cache);
}

static struct pbase_tree {
	struct pbase_tree *next;