In case sigma=0, then return 0 early from SigmaShift

diff --git a/PWGLF/FORWARD/analysis2/AliLandauGaus.h b/PWGLF/FORWARD/analysis2/AliLandauGaus.h
index e6ee1cf83aac5bde3b775074da5e8de383dd0056..4b26de250ebe47af5a9c8448a610d456c2d8b4e5 100644 (file)
--- a/PWGLF/FORWARD/analysis2/AliLandauGaus.h
+++ b/PWGLF/FORWARD/analysis2/AliLandauGaus.h
@@ -505,6 +505,7 @@ inline Double_t
 AliLandauGaus::SigmaShift(Int_t i, Double_t xi, Double_t sigma)
 {
   if (xi <= 0) return 0;
+  if (sigma <= 0) return 0;
   const Double_t c = SigmaShiftC();
   const Double_t p = SigmaShiftP();
   const Double_t u = sigma / xi;