[TIP_User] "owner_field" defaults to null
[TIP_User] "owner_field" defaults to null

The user table by default should not have an owner field (to avoid
mutual recursion in getting the current user id). This edit set by
default the "owner_field" to null, so no "IS_OWNER" automatic field
is calculated by _onDataRow() callback.

BackupTheBerlios/tip