lib_com/lsf_tools_fx.c : restore shl_o in E_LPC_f_lsp_pol_get()

    /*b = -2.0f * *plsp;*/

    b = *plsp;

    move16();

#ifdef ISSUE_1796_replace_shl_o

    m2 = shl_sat( -2, sub( 15, Q_out ) );

    /* There's only 1 integer to solve -32768 = -2 * 2^y, y = 14 .

     * so we can assume a saturated overflow, if -2 * 2^y = -32768 and y is not 14.

     */

    test();

    IF( m2 == MIN_16 && Q_out != 1 )

    {

        Overflow = 1;

    }

#else

    m2 = shl_o( -2, sub( 15, Q_out ), &Overflow );

#endif

    f[1] = L_mult_o( b, m2, &Overflow );

    move32();