Reset propertly the arrays properties used to read spectra data

src/drivers/oceanoptics/RealQE65000Driver.cpp

@@ -73,8 +73,11 @@ void RealQE65000Driver::start() {
 	//Delete current arrays
 	if (owner()->xData()) {
 		delete[] owner()->xData();
+		owner()->xData.set(nullptr);
+
 	} else if (owner()->yData())  {
 		delete[] owner()->yData();
+		owner()->yData.set(nullptr);
 	}
 
 	//Modification of 17/08/2016 -> really slow access to the following methods. Call them only in init method.
@@ -207,9 +210,12 @@ void RealQE65000Driver::setIntegrationTime(int32 integrationTime) {
 void RealQE65000Driver::getFormattedSpectrum() {
 	int32 error = 0;
 
-	float64* doubleBuffer = (float64 *) calloc(owner()->size(), sizeof(float64));
+	float64* doubleBuffer = new float64[owner()->size()];
 	sbapi_spectrometer_get_formatted_spectrum(deviceId, spectrometerId, &error, doubleBuffer, owner()->size());
 
+	// Delete previous data.
+	delete [] owner()->yData();
+
 	//Spectrum = Y data
 	owner()->yData.set(doubleBuffer);
 	owner()->yData.setSize((int64) owner()->size());
@@ -222,9 +228,12 @@ void RealQE65000Driver::getWavelength() {
 	int32 error = 0;
 
 	int32 length = sbapi_spectrometer_get_formatted_spectrum_length(deviceId, spectrometerId, &error);
-	float64* valuesBuffer = (float64 *) calloc(owner()->size(), sizeof(float64));
+	float64* valuesBuffer = new float64[owner()->size()];
 	sbapi_spectrometer_get_wavelengths(deviceId, spectrometerId, &error, valuesBuffer, owner()->size());
 
+	// Delete previous data.
+	delete [] owner()->xData();
+
 	owner()->xData.set(valuesBuffer);
 	owner()->xData.setSize((int64) owner()->size());
 }