ck_bag: Initialize n_entries.

include/ck_bag.h

@@ -146,6 +146,7 @@ ck_bag_iterator_init(ck_bag_iterator_t *iterator, ck_bag_t *bag)
 
 	iterator->block = ck_pr_load_ptr(&bag->head);
 	iterator->index = 0;
+	iterator->n_entries = 0;
 	if (iterator->block != NULL)
 		iterator->n_entries = ck_bag_block_count(iterator->block);