temperature_calibration: make sure to call orb_unsubscribe() when objects are destroyed

src/modules/events/temperature_calibration/accel.cpp

@@ -60,6 +60,13 @@ TemperatureCalibrationAccel::TemperatureCalibrationAccel(float min_temperature_r
 	}
 }
 
+TemperatureCalibrationAccel::~TemperatureCalibrationAccel()
+{
+	for (unsigned i = 0; i < _num_sensor_instances; i++) {
+		orb_unsubscribe(_sensor_subs[i]);
+	}
+}
+
 void TemperatureCalibrationAccel::reset_calibration()
 {
 	/* reset all driver level calibrations */

src/modules/events/temperature_calibration/accel.h

@@ -40,7 +40,7 @@ class TemperatureCalibrationAccel : public TemperatureCalibrationBase
 {
 public:
 	TemperatureCalibrationAccel(float min_temperature_rise);
-	virtual ~TemperatureCalibrationAccel() {}
+	virtual ~TemperatureCalibrationAccel();
 
 	/**
 	 * @see TemperatureCalibrationBase::update()

src/modules/events/temperature_calibration/baro.cpp

@@ -60,6 +60,13 @@ TemperatureCalibrationBaro::TemperatureCalibrationBaro(float min_temperature_ris
 	}
 }
 
+TemperatureCalibrationBaro::~TemperatureCalibrationBaro()
+{
+	for (unsigned i = 0; i < _num_sensor_instances; i++) {
+		orb_unsubscribe(_sensor_subs[i]);
+	}
+}
+
 void TemperatureCalibrationBaro::reset_calibration()
 {
 	//nothing to do

src/modules/events/temperature_calibration/baro.h

@@ -43,7 +43,7 @@ class TemperatureCalibrationBaro : public TemperatureCalibrationBase
 {
 public:
 	TemperatureCalibrationBaro(float min_temperature_rise);
-	virtual ~TemperatureCalibrationBaro() {}
+	virtual ~TemperatureCalibrationBaro();
 
 	/**
 	 * @see TemperatureCalibrationBase::update()