bcachefs: fix integer underflow in journal code

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-02-27 19:14:23 -05:00 • committed by Kent Overstreet
commit 8db2acde2f
2 changed files with 5 additions and 1 deletions