different error message than with GNU when "-i" and "pipe" are passed

```
$ echo "euÃkOvÃEZc4hBr"|LANG="C" sed -n -i -e "c\\kgII"
sed: no input files
```

With our:

```
$ echo "euÃkOvÃEZc4hBr"|cargo run -q sed -n -i -e "c\\kgII"
sed: error Reading metadata of '-' for in-place edit: No such file or directory
```

I think our is better. Maybe I should adjust the fuzzer with that information.
WDYT ?

fuzzer: https://github.com/uutils/sed/pull/72
