From 1d96fee97f099c829ffc85ee992cb7a36bcbb4d5 Mon Sep 17 00:00:00 2001
From: shahoian <shahoian@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Tue, 18 Oct 2011 13:53:46 +0000
Subject: [PATCH] Protection against division by 0 (Maksym Zyzak)

---
 STEER/ESD/AliKFParticleBase.cxx | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/STEER/ESD/AliKFParticleBase.cxx b/STEER/ESD/AliKFParticleBase.cxx
index 4bf3f04693e..4df9d9765d3 100644
--- a/STEER/ESD/AliKFParticleBase.cxx
+++ b/STEER/ESD/AliKFParticleBase.cxx
@@ -1032,7 +1032,14 @@ void AliKFParticleBase::GetDStoParticleBz( Double_t B, const AliKFParticleBase &
     
     Double_t p2  = (px *px  + py *py); 
     Double_t p21 = (px1*px1 + py1*py1);
-    
+
+    if( TMath::Abs(p2) < 1.e-8 || TMath::Abs(p21) < 1.e-8 )
+    {
+      DS=0.;
+      DS1=0.;
+      return;
+    }
+
     Double_t a = (px*py1 - py*px1);
     Double_t b = (px*px1 + py*py1);
     
-- 
2.43.0