Refs #21752 fix another warning

Framework/Kernel/src/Statistics.cpp

@@ -132,11 +132,11 @@ std::vector<double> getWeightedZscore(const vector<TYPE> &data,
   }
   double weightedMean = sumWeightedData / sumWeights;
   for (size_t it = 0; it != data.size(); ++it) {
-    weightedVariance += std::pow(data[it] - weightedMean, 2) *
-                        std::pow(weights[it] / sumWeights, 2);
+    weightedVariance += std::pow(static_cast<double>(data[it]) - weightedMean, 2) *
+                        std::pow(static_cast<double>(weights[it]) / sumWeights, 2);
   }
   for (auto it = data.cbegin(); it != data.cend(); ++it) {
-    Zscore.push_back(fabs((*it - weightedMean) / std::sqrt(weightedVariance)));
+    Zscore.push_back(fabs((static_cast<double>(*it) - weightedMean) / std::sqrt(weightedVariance)));
   }
   return Zscore;
 }

Framework/MDAlgorithms/inc/MantidMDAlgorithms/FindPeaksMD.h

@@ -100,8 +100,6 @@ private:
   Mantid::Geometry::Instrument_const_sptr inst;
   /// Run number of the peaks
   int m_runNumber;
-  /// Unique peak number
-  int m_peakNumber;
   /// Dimension type
   eDimensionType dimType;
   /// Goniometer matrix

Framework/MDAlgorithms/src/FindPeaksMD.cpp

@@ -114,7 +114,7 @@ const std::string FindPeaksMD::numberOfEventsNormalization =
 FindPeaksMD::FindPeaksMD()
     : peakWS(), peakRadiusSquared(), DensityThresholdFactor(0.0), m_maxPeaks(0),
       m_addDetectors(true), m_densityScaleFactor(1e-6), prog(nullptr), inst(),
-      m_runNumber(-1), m_peakNumber(1), dimType(), m_goniometer() {}
+      m_runNumber(-1), dimType(), m_goniometer() {}
 
 //----------------------------------------------------------------------------------------------
 /** Initialize the algorithm's properties.