Fix 'get_id_rating_curve_hydro' when there is no active rating curve
'get_id_rating_curve_hydro' doesn't work when all the rating curve are disactivated, because the words "(En cours)" are not displayed
>> get_id_rating_curve_hydro(code = "A125053201")
Error in data.frame(name = list_req_tab_rc_name, id = as.integer(list_req_tab_rc_id)) :
arguments imply differing number of rows: 0, 5