add: else payee -> payee_name = NULL;
context: gboolean gsb_data_payee_set_name ( gint no_payee,			      const gchar *name ){    struct_payee *payee;    payee = gsb_data_payee_get_structure ( no_payee );    if (!payee)	return FALSE;    /* we free the last name */    if ( payee -> payee_name )	free (payee -> payee_name);        /* and copy the new one */    payee -> payee_name = g_strdup (name);    return TRUE;}