bcachefs: Tighten up btree_path assertions

Currently seeing a very rare and difficult to explain btree_path
inconsistency - this patch adds assertions to the only place that seems
to be missing them.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-07-21 09:53:28 -04:00 • committed by Kent Overstreet
commit 01eed77178