Fixing compiler error

analytics/Makefile

@@ -61,6 +61,6 @@ libdcdboperator_filesink.$(LIBEXT): operators/filesink/FilesinkOperator.o operat
 libdcdboperator_smucngperf.$(LIBEXT): operators/smucngperf/SMUCNGPerfOperator.o operators/smucngperf/SMUCNGPerfConfigurator.o operators/smucngperf/SKXPMUMetrics.o ../common/src/sensornavigator.o
 	$(CXX) $(LIBFLAGS)$@ -o $@ $^ -L$(DCDBDEPLOYPATH)/lib/ -lboost_log -lboost_system -lboost_regex
 
-libdcdboperator_persystsql.$(LIBEXT): operators/persystsql/JobTSAggregatorOperator.o operators/persystsql/JobTSAggregatorConfigurator.o ../common/src/sensornavigator.o
+libdcdboperator_persystsql.$(LIBEXT): operators/persystsql/PerSystSqlOperator.o operators/persystsql/PerSystSqlConfigurator.o ../common/src/sensornavigator.o
 	$(CXX) $(LIBFLAGS)$@ -o $@ $^ -L$(DCDBDEPLOYPATH)/lib/ -lboost_log -lboost_system -lboost_regex
 

analytics/operators/persystsql/PerSystSqlOperator.cpp

@@ -188,6 +188,6 @@ float severity_memory(float metric, float threshold, float max_memory){
 	return severity;
 }
 
-void PerSystSqlOperator::computeSeverityAverage(vector<reading_t> & buffer){
-
+int64_t PerSystSqlOperator::computeSeverityAverage(vector<reading_t> & buffer){
+	return 0;
 }

analytics/operators/persystsql/PerSystSqlOperator.h

@@ -82,7 +82,7 @@ private:
 protected:
 	virtual void compute(U_Ptr unit)	 override;
 	void compute_internal(U_Ptr unit, vector<reading_t> buffer);
-	void computeSeverityAverage(vector<reading_t> & buffer);
+	int64_t computeSeverityAverage(vector<reading_t> & buffer);
 	std::vector<AggregatorSBPtr> _quantileSensors;
 	unsigned int _number_of_even_quantiles;
 	Formula _severity_formula;