for (j = count;j > T;j--)
    {
        M[j].magnitude = 0;
        //__real__ M[j].coef = 0.0;
        //__imag__ M[j].coef = 0.0; << Segmentation fault
    M[j].coef = 0.0 + 0.0 * I;//<< Segmentation fault
    }