> > You are right, num_values is always 1 for TID_KEYS. The number of subkeys is stored in 
> >   ((KEYLIST *) ((char *)pheader + pkey->data))->num_keys
> > Maybe we should add a function to return this. But so far db_enum_key() was enough.

Hmm... is there any use case where you want to know the number of directory entries, but you will not iterate 
over them later?

K.O.