98_Heating_Control, 98_WeekdayTimer:
98_Heating_Control, 98_WeekdayTimer: fix for https://forum.fhem.de/index.php/topic,50150.msg419471.html#msg419471View Changes
Source: 98_Heating_Control, 98_WeekdayTimer: (https://sourceforge.net/p/fhem/code/11041/)