btrfs: clean up extraneous computations in add_delayed_refs

Repeating the same computation in multiple places is not
necessary.

Signed-off-by: Edmund Nadolski <enadolski@suse.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Edmund Nadolski 2017-07-12 16:20:11 -06:00 • committed by David Sterba
commit 01747e92a9