bugfix Ranges() when calculate BG chi2 sidebands

Author: lubynets

PWGHF/D2H/Macros/HFInvMassFitter.cxx

@@ -259,7 +259,7 @@ void HFInvMassFitter::doFit()
     // define the frame to evaluate background sidebands chi2 (bg pdf needs to be plotted within sideband ranges)
     RooPlot* frameTemporary = mass->frame(Title(Form("%s_temp", mHistoInvMass->GetTitle())));
     dataHistogram.plotOn(frameTemporary, Name("data_for_bkgchi2"));
-    mBkgPdf->plotOn(frameTemporary, Range("SBL", true), Name("Bkg_sidebands"));
+    mBkgPdf->plotOn(frameTemporary, Range(sbRanges.c_str()), Name("Bkg_sidebands"));
     mChiSquareOverNdfBkg = frameTemporary->chiSquare("Bkg_sidebands", "data_for_bkgchi2"); // calculate reduced chi2 / NDF of background sidebands (pre-fit)
     delete frameTemporary;
     if (mDrawBgPrefit) {