btrfs-progs: mkfs: treat btrfs_add_to_fsid as fatal error

When btrfs_add_to_fsid fails in mkfs we try to close the ctree.  That
complains that we already have a transaction open.  We should be taking
the error path and exit cleanly without writing.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

mkfs/main.c

@@ -1268,7 +1268,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
 					sectorsize, sectorsize, sectorsize);
 		if (ret) {
 			error("unable to add %s to filesystem: %d", file, ret);
-			goto out;
+			goto error;
 		}
 		if (verbose >= 2) {
 			struct btrfs_device *device;