Diag: clear machine machineEventSet on valid data

This is allowed only here: dc-data is valid (i.e. check for E255 was
sucessfull).
This method sub_componentAssessment() will check all criteria of
dc-module conditions.

src/ATBAPP/DeviceControllerDiag.cpp

@@ -231,6 +231,8 @@ void DeviceControllerDiag::sys_superviseSystem()
 
 void DeviceControllerDiag::sub_componentAssessment()
 {
+    this->machineEventSet.clear();
+
     bool flag_sendOperate = true;
 
     struct T_moduleCondition modCond = {};