btrfs: use new error message helper in qgroup_account_snapshot

We've renamed btrfs_std_error, this one is left from last merge.
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/transaction.c

@@ -1385,7 +1385,7 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans,
 	switch_commit_roots(trans->transaction, fs_info);
 	ret = btrfs_write_and_wait_transaction(trans, src);
 	if (ret)
-		btrfs_std_error(fs_info, ret,
+		btrfs_handle_fs_error(fs_info, ret,
 			"Error while writing out transaction for qgroup");
 
 out: