Fixed this->_delay typo

Author: luisllamasbinaburo

src/Observables/ObservableTimerMillis.h

@@ -60,9 +60,9 @@ void ObservableTimerMillis<T>::Suscribe(IObserver<T> &observer)
 template <typename T>
 void ObservableTimerMillis<T>::Update()
 {
-	if (_isActive == false) return;
-
-	auto elapsed = static_cast<unsigned long>(millis() - _startTime);
+	if (_isActive == false) return;
+
+	auto elapsed = static_cast<unsigned long>(millis() - _startTime);
 	if (elapsed >= _interval + _offset)
 	{
 		if (_childObserver != nullptr) _childObserver->OnNext(elapsed);
@@ -74,7 +74,7 @@ template <typename T>
 void ObservableTimerMillis<T>::Reset()
 {
 	this->_isActive = true;
-	this->_offset = delay;
+	this->_offset = this->_delay;
 	this->_startTime = millis();
 }
 
@@ -122,4 +122,4 @@ bool ObservableTimerMillis<T>::IsActive() const
 	return _isActive;
 }
 
-#endif
+#endif