interrupt(): gate descriptor is not valid sys seg

Running MS-DOS 6.22 within bochs, my `bochsout.txt` file is
continuously flooded with the following four lines:

```
[CPU0  ] interrupt(): gate descriptor is not valid sys seg (vector=0x28)
[CPU0  ] interrupt(): gate descriptor is not valid sys seg (vector=0x16)
[CPU0  ] interrupt(): gate descriptor is not valid sys seg (vector=0x16)
[CPU0  ] interrupt(): gate descriptor is not valid sys seg (vector=0x16)
```

Is this a known problem?  Am I doing something wrong?  A quick search
in the internet didn't reveal anything.  I'm using boch's default
configuration file, with

```
ata0-master: type=disk, mode=flat, path="/home/wl/.bochs/c.msdos.img", cylinders=0
```

as the only change.


    Werner