* hence +2.
*/
it->subtree_alloc = subtree_nr + 2;
- it->down = xcalloc(it->subtree_alloc, sizeof(struct cache_tree_sub *));
+ CALLOC_ARRAY(it->down, it->subtree_alloc);
for (i = 0; i < subtree_nr; i++) {
/* read each subtree */
struct cache_tree *sub;