[Patch, Fortran] PR602864 - fix INQUIRE for write= with stdout/stdin/stderr

[Janus Weil]

Hi Tobias,

> A rather simple patch.
>
> Build and regtested on x86-64-gnu-linux.
> OK for the trunk?

the patch looks pretty much trivial, int the sense that you just
hard-wire the expected values for the std* units as a special case. I
wonder why the 'inquire_read' and 'inquire_write' functions don't
actually return the correct values?

Cheers,
Janus