[Bug c/122879] bool from complex with SNAN not raise FE_INVALID

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122879

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am not sure this is valid.
What the conversion/comparison does `REAL<a> == 0 && IMAG<a> == 0` with a short
cut if the real part is non zero.