Carpenter <dan.carpenter@oracle.com> 1340101811 +0300
committer Chris Mason <chris.mason@fusionio.com> 1343072499 -0400

Btrfs: small naming cleanup in join_transaction()

"root->fs_info" and "fs_info" are the same, but "fs_info" is prefered
because it is shorter and that's what is used in the rest of the
function.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>