bcachefs: Fix an error path

It's possible to get -EIO in __btree_iter_traverse_all() after looping,
with orig_iter NULL.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-10-02 00:29:37 -04:00 • committed by Kent Overstreet
commit ab9ff73322