rem: operation -> taux_change = taux_de_change[0]; operation -> frais_change = taux_de_change[1];
add: transaction -> taux_change = taux_de_change[0]; transaction -> frais_change = taux_de_change[1];
context: void click_sur_bouton_voir_change ( void ){    struct structure_operation *operation;    struct struct_devise *devise;    gtk_widget_grab_focus ( widget_formulaire_par_element (TRANSACTION_FORM_DATE) );    operation = gtk_object_get_data ( GTK_OBJECT ( formulaire ),				      "adr_struct_ope" );    if ( !devise_compte ||	 devise_compte -> no_devise != gsb_account_get_currency (compte_courant) )	devise_compte = devise_par_no ( gsb_account_get_currency (compte_courant) );    devise = devise_par_no ( operation -> devise );    demande_taux_de_change ( devise_compte, devise,			     operation -> une_devise_compte_egale_x_devise_ope,			     operation -> taux_change, operation -> frais_change, 			     TRUE );    if ( taux_de_change[0] ||  taux_de_change[1] )    {	operation -> taux_change = taux_de_change[0];	operation -> frais_change = taux_de_change[1];	if ( operation -> taux_change < 0 )	{	    operation -> taux_change = -operation -> taux_change;	    operation -> une_devise_compte_egale_x_devise_ope = 1;	}	else	    operation -> une_devise_compte_egale_x_devise_ope = 0;    }}