[m-users.] Compiler warning in my readdir.m

[Volker Wysk]

Am Sonntag, den 13.10.2019, 23:30 -0500 schrieb Julian Fondren:
> What you're doing though is pretty weird: returning a string just
> so that Mercury can test for that string.

The empty string is used to report the end of directory to the caller.
This is used only internally.

Cheers
Volker