css class for hook_user() view

Hi ken, this one is very minor and d5 only.

From the hook_user() documentation:

    * view": An associative array of associative arrays. The outer array should be keyed by category name. The interior array(s) should have a unique textual key and have 'title', 'value'  and 'class' elements. See theme_user_profile() and an example at user_user() 

In domain_user() only 'title' and 'value' are defined, the 'class' element is not defined.