Editor: Doors can't be unlocked

There's a rather nonsensical code branch in saving cell refs like so:

        if (!inInventory)
        {
            int lockLevel = mLockLevel;
            if (lockLevel == 0 && mIsLocked)
                lockLevel = ZeroLock;
            if (lockLevel != 0)
                esm.writeHNT("FLTV", lockLevel);
            esm.writeHNOCRefId("KNAM", mKey);
            esm.writeHNOCRefId("TNAM", mTrap);
        }

The problem is, altering the lock value of a locked door is overridden by this, and zero value locks are instead assigned the lock value of INT_MAX. Naturally this is a big problem when trying to do anything with doors.