[PATCH v3 3/3] Add tests with floating-point arguments for err* and verr* functions

[Florian Weimer]

* Gabriel F. T. Gomes:

> +static void
> +callback_err (void *closure)
> +{
> +  err (0, "%Lf", (long double) -1);
> +}

Same problem as in the other test: You need to initialize errno in each
subprocess callback.

Otherwise, looks okay.  You can commit if you add the errno
initialization.

Thanks,
Florian