changed name of a function for a more precise self description. Added function to collect to mu minus parameters.

src/classes/PFitterFcn.cpp

@@ -114,7 +114,7 @@ void PFitterFcn::CalcExpectedChiSquare(const std::vector<Double_t> &par, Double_
 
     // single histo
     for (UInt_t i=0; i<fRunListCollection->GetNoOfSingleHisto(); i++) {
-      value = fRunListCollection->GetSingleHistoChisqExpected(par, i); // calculate the expected chisq for single histo run block 'i'
+      value = fRunListCollection->GetSingleRunChisqExpected(par, i); // calculate the expected chisq for single histo run block 'i'
       expectedChisqPerRun.push_back(value);
       totalExpectedChisq += value;
     }