Can't save settings without entering values

[heikki]

If you open the system config page, change nothing, and try to save it, you get the following errors:

The field 'maximum selected records' must be an integer. The field 'maximum selected records' must be >= 1000. The field 'base' cannot be empty. The field 'users' cannot be empty. The field '*not-found:nameattr*' cannot be empty. The field 'uid attribute' cannot be empty.

[heikki]

Was caused by a local change in the byzantine code we're using to simply submit a form.