Catching the row deleted from a GtkTreeModel implementation

[Fontana Nicola <ntd users sourceforge net>]

I'm keeping some summary fields of a GtkListStore and I need to update them on 
every model change. The problem is while catching the "row-deleted" signal 
the row is yet deleted, so I can't access the row content to update my 
summary fields.

How can I do it?

Thanks,

-- Nicola