Analytics: improving normalization in CS plugin

analytics/operators/cssignatures/CSOperator.cpp

@@ -429,13 +429,13 @@ void CSOperator::computeSignature(U_Ptr unit, uint64_t nowTs) {
 
 // Normalizes sensor data
 void CSOperator::normalize(std::vector<reading_t> &v, size_t idx) {
-    int64_t denom = _max[idx]!=_min[idx] ? (_max[idx] - _min[idx]) : 1;
+    double denom = _max[idx]!=_min[idx] ? (double)_scalingFactor / (double)(_max[idx] - _min[idx]) : (double)_scalingFactor;
     for(size_t idx2=0; idx2<v.size(); idx2++) {
         if(v[idx2].value > _max[idx])
             v[idx2].value = _max[idx];
         else if(v[idx2].value < _min[idx])
             v[idx2].value = _min[idx];
-        v[idx2].value = (v[idx2].value - _min[idx]) * _scalingFactor / denom;
+        v[idx2].value = (int64_t)((double)(v[idx2].value - _min[idx]) * denom);
     }
 }