[Bug fortran/82207] ieee_class identifies signaling NaNs as quiet NaNs

[sacks at ucar dot edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82207

--- Comment #3 from Bill Sacks <sacks at ucar dot edu> ---
Thanks for pointing that out, kargl. I'm fine with this being closed if it's
not actually a bug: it's not causing me any problems, I just happened to notice
it in the course of investigating other aspects of gfortran's NaN handling.