rem: return ( g_date_compare ( a -> date, b -> date ));
add: return ( g_date_compare ( gsb_data_scheduled_get_date (scheduled_number_1), gsb_data_scheduled_get_date (scheduled_number_2) ));
context: gint classement_sliste_echeance_par_date ( struct operation_echeance * a, 					   struct operation_echeance * b ){    return ( g_date_compare ( a -> date,			      b -> date ));}