Only warn about GPG_TTY on non-windows OSs
Only warn about GPG_TTY on non-windows OSs

anton-dessiatov/stack,martin-kolinek/stack,Heather/stack,martin-kolinek/stack,sjakobi/stack,Fuuzetsu/stack,deech/stack,juhp/stack,juhp/stack,Fuuzetsu/stack,MichielDerhaeg/stack,MichielDerhaeg/stack,deech/stack,mrkkrp/stack,AndrewRademacher/stack,AndreasPK/stack,Heather/stack,anton-dessiatov/stack,Blaisorblade/stack,AndrewRademacher/stack,sjakobi/stack,AndreasPK/stack,mrkkrp/stack,Blaisorblade/stack