ITS: minor cleanup

Signed-off-by: Felix Schlepper <felix.schlepper@cern.ch>

Author: f3sch

Detectors/ITSMFT/ITS/tracking/src/TrackerTraits.cxx

@@ -16,6 +16,7 @@
 #include <algorithm>
 #include <iterator>
 #include <ranges>
+#include <cmath>
 #include <type_traits>
 
 #include <oneapi/tbb/blocked_range.h>
@@ -33,8 +34,6 @@
 #include "ITStracking/Tracklet.h"
 #include "ReconstructionDataFormats/Track.h"
 
-using o2::base::PropagatorF;
-
 namespace o2::its
 {
 
@@ -896,7 +895,7 @@ bool TrackerTraits<NLayers>::fitTrack(TrackITSExt& track, int start, int end, in
     }
     nCl++;
   }
-  return std::abs(track.getQ2Pt()) < maxQoverPt && track.getChi2() < chi2ndfcut * (nCl * 2 - 5);
+  return std::abs(track.getQ2Pt()) < maxQoverPt && track.getChi2() < chi2ndfcut * (float)((nCl * 2) - 5);
 }
 
 // create a new seed either from the existing track inner param or reseed from the edgepointd and cluster in the middle
@@ -947,17 +946,17 @@ track::TrackParCov TrackerTraits<NLayers>::buildTrackSeed(const Cluster& cluster
 {
   const float sign = reverse ? -1.f : 1.f;
 
-  float ca, sa;
+  float ca = NAN, sa = NAN;
   o2::gpu::CAMath::SinCos(tf3.alphaTrackingFrame, sa, ca);
 
-  const float x1 = cluster1.xCoordinate * ca + cluster1.yCoordinate * sa;
-  const float y1 = -cluster1.xCoordinate * sa + cluster1.yCoordinate * ca;
-  const float x2 = cluster2.xCoordinate * ca + cluster2.yCoordinate * sa;
-  const float y2 = -cluster2.xCoordinate * sa + cluster2.yCoordinate * ca;
+  const float x1 = (cluster1.xCoordinate * ca) + (cluster1.yCoordinate * sa);
+  const float y1 = (-cluster1.xCoordinate * sa) + (cluster1.yCoordinate * ca);
+  const float x2 = (cluster2.xCoordinate * ca) + (cluster2.yCoordinate * sa);
+  const float y2 = (-cluster2.xCoordinate * sa) + (cluster2.yCoordinate * ca);
   const float x3 = tf3.xTrackingFrame;
   const float y3 = tf3.positionTrackingFrame[0];
 
-  float snp, q2pt, q2pt2;
+  float snp = NAN, q2pt = NAN, q2pt2 = NAN;
   if (mIsZeroField) {
     const float dx = x3 - x1;
     const float dy = y3 - y1;