btrfs: use narrower type for btrfs_transaction::num_dirty_bgs

The u64 is an overkill here, we could not possibly create that many
blockgroups in one transaction.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-11-08 02:12:57 +01:00
commit 165c8b022c
2 changed files with 2 additions and 2 deletions