Incorrect error when -loglevel is used

So I've got a test failure:

```
drrun -s 90 -quiet -debug -killpg -stderr_mask -- tests/bin/common.decode-bad
```

and I want to rerun it with logging:

```
drrun -s 90 -quiet -debug -loglevel 2 -killpg -stderr_mask -- tests/bin/common.decode-bad
```

but it faults whatever option is after -loglevel and its argument:

```

```

Clearly this is a debug build otherwise -loglevel itself would have been faulted.