absolutely broken pitch tonk code (ZSCRIPT)

Class MT_PlayerWeapon : Weapon
{
Default
{
Weapon.AmmoUse1 0;
Weapon.AmmoUse2 0;
Weapon.AmmoType1 "Clip";
Weapon.AmmoType2 "Clip";
+WEAPON.ALT_AMMO_OPTIONAL;
+WEAPON.AMMO_OPTIONAL;
+WEAPON.DONTBOB;
+INVENTORY.UNDROPPABLE;
+INVENTORY.UNCLEARABLE;
}
    States
    {
    Ready:
        CHGG A 1 A_WeaponReady;
        Loop;
    Deselect:
        CHGG A 1 A_Lower;
        Loop;
    Select:
        CHGG A 1 A_Raise;
        Loop;
    AltFire:
    Fire:
        CHGG AB 4 A_FireCGun;
        CHGG B 0 A_ReFire;
        Goto Ready;
    Flash:
        CHGF A 5 Bright A_Light1;
        Goto LightDone;
        CHGF B 5 Bright A_Light2;
        Goto LightDone;
    Spawn:
        MGUN A -1;
        Stop;
    }
}

//------------------------------------------------------------------------------
//CUSTOM FUNCTIONS
//------------------------------------------------------------------------------
class MTA_Funcs : Actor
{
Action Double MTA_ResetPitch(double pitch = 0)
{
    double old_pitch = pitch;

        if (pitch < 0)
        {
            old_pitch = pitch - (pitch * 2);
        }

        else if (pitch > 0)
        {
            old_pitch = pitch + (pitch * 2);
        }

        else
        {
            old_pitch = 0;
        }

    return old_pitch;
}}