changed helper function wrap_azi

    float azi = azi_deg;

    /* Wrap azimuth value */

    if ( fabsf( azi ) > 180 )

    while ( azi > 180 )

    {

        azi = fmodf( azi + 180, 360 );

        if ( azi < 0 )

        {

            azi += 360;

        }

        azi -= 180;

        azi -= 360.0f;

    }

    /* Set -180 to 180 for deduplication purposes; angles are otherwise identical */

    if ( azi == -180 )

    while ( azi <= -180 )

    {

        azi = 180;

        azi += 360;

    }

    return azi;

}