[Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct

[t.sprodowski at web dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991

--- Comment #3 from t.sprodowski at web dot de ---
Octave 4.2.2: ans = 2.6284e-20 + 4.2924e-04i