[PATCH 0/1] MR4768: ole32: Fix a possible use-after-free (Coverity).

[Zhiyi Zhang (＠zhiyi)]

moniker_tree_get_rightmost(root) can return the same pointer as the root parameter so node can
equal to root. moniker_tree_discard(node) frees node, which could be same as root. Then
moniker_create_from_tree(root) could access the already freed pointer.