prot against div with zero

diff --git a/PWGGA/EMCALJetTasks/AliAnalysisTaskScale.cxx b/PWGGA/EMCALJetTasks/AliAnalysisTaskScale.cxx
index 5ffe9dae2bd115e9bcca6eeb34483b461b2f9ede..58636b6d983ee841e946d3ac9d5dbba0ea56bb0b 100644 (file)
--- a/PWGGA/EMCALJetTasks/AliAnalysisTaskScale.cxx
+++ b/PWGGA/EMCALJetTasks/AliAnalysisTaskScale.cxx
@@ -207,6 +207,9 @@ void AliAnalysisTaskScale::UserExec(Option_t *)
     Et += nPart.Pt();
   }
   
+  if (ptTPC == 0) 
+    return;
+
   const Double_t scalecalc = ((Et + ptEMCAL) / EmcalArea) * (TpcArea / ptTPC);
 
   const Double_t scale     = GetScaleFactor(cent);