Drop tautological comparison (#2502)

A pointer to a reference cannot be nullptr. If it is, whatever created the
reference in the first place has already crashed. If this is to be protected,
one should return the pointer and check that.

Author: ktf

Modules/MUON/MCH/src/GlobalHistogram.cxx

@@ -669,9 +669,6 @@ void GlobalHistogram::getDeCenterST12(int de, float& xB0, float& yB0, float& xNB
   }
 
   const o2::mch::mapping::Segmentation& segment = o2::mch::mapping::segmentation(de);
-  if ((&segment) == nullptr) {
-    return;
-  }
   const o2::mch::mapping::CathodeSegmentation& csegment = segment.bending();
   o2::mch::contour::Contour<double> envelop = o2::mch::mapping::getEnvelop(csegment);
   std::vector<o2::mch::contour::Vertex<double>> vertices = envelop.getVertices();
@@ -742,9 +739,6 @@ void GlobalHistogram::getDeCenterST3(int de, float& xB0, float& yB0, float& xNB0
   }
 
   const o2::mch::mapping::Segmentation& segment = o2::mch::mapping::segmentation(de);
-  if ((&segment) == nullptr) {
-    return;
-  }
   const o2::mch::mapping::CathodeSegmentation& csegment = segment.bending();
   o2::mch::contour::Contour<double> envelop = o2::mch::mapping::getEnvelop(csegment);
   std::vector<o2::mch::contour::Vertex<double>> vertices = envelop.getVertices();
@@ -851,9 +845,6 @@ void GlobalHistogram::getDeCenterST4(int de, float& xB0, float& yB0, float& xNB0
   }
 
   const o2::mch::mapping::Segmentation& segment = o2::mch::mapping::segmentation(de);
-  if ((&segment) == nullptr) {
-    return;
-  }
   const o2::mch::mapping::CathodeSegmentation& csegment = segment.bending();
   o2::mch::contour::Contour<double> envelop = o2::mch::mapping::getEnvelop(csegment);
   std::vector<o2::mch::contour::Vertex<double>> vertices = envelop.getVertices();