btrfs: handle btrfs_record_root_in_trans failure in relocate_tree_block

btrfs_record_root_in_trans will return errors in the future, so handle
the error properly in relocate_tree_block.
Reviewed-by: NQu Wenruo <wqu@suse.com>
Signed-off-by: NJosef Bacik <josef@toxicpanda.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/relocation.c

@@ -2548,7 +2548,9 @@ static int relocate_tree_block(struct btrfs_trans_handle *trans,
 				ret = -EUCLEAN;
 				goto out;
 			}
-			btrfs_record_root_in_trans(trans, root);
+			ret = btrfs_record_root_in_trans(trans, root);
+			if (ret)
+				goto out;
 			root = root->reloc_root;
 			node->new_bytenr = root->node->start;
 			btrfs_put_root(node->root);