From 979e3647d297f4e39f6568bb17199cd807227d9c Mon Sep 17 00:00:00 2001
From: masera <masera@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Wed, 21 Jan 2004 11:35:48 +0000
Subject: [PATCH] minor protections added

---
 ITS/AliITSGeoPlot.C     | 1 +
 ITS/AliITSVertexer.cxx  | 2 +-
 ITS/AliITSVertexerZ.cxx | 5 +++--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/ITS/AliITSGeoPlot.C b/ITS/AliITSGeoPlot.C
index 27cf5dd8983..39c216dd67c 100644
--- a/ITS/AliITSGeoPlot.C
+++ b/ITS/AliITSGeoPlot.C
@@ -12,6 +12,7 @@
 #include<TObject.h>
 #include<TObjArray.h>
 #include<TTree.h>
+#include "AliGenEventHeader.h"
 #include <AliRun.h>
 #include <AliITS.h>
 #include <AliITSgeom.h>
diff --git a/ITS/AliITSVertexer.cxx b/ITS/AliITSVertexer.cxx
index d8c88efd059..c186ae700ca 100644
--- a/ITS/AliITSVertexer.cxx
+++ b/ITS/AliITSVertexer.cxx
@@ -37,7 +37,7 @@ AliITSVertexer::AliITSVertexer(TString filename) {
   SetLastEvent(0);
   rl->LoadHeader();
   AliITSLoader* itsLoader =  (AliITSLoader*) rl->GetLoader("ITSLoader");
-  if(filename.Data()!="default")itsLoader->SetVerticesFileName(filename);
+  if(!filename.Contains("default"))itsLoader->SetVerticesFileName(filename);
   itsLoader->LoadVertices("recreate");
   itsLoader->LoadRecPoints();
   Int_t lst;
diff --git a/ITS/AliITSVertexerZ.cxx b/ITS/AliITSVertexerZ.cxx
index 574b247c705..5df3e729627 100644
--- a/ITS/AliITSVertexerZ.cxx
+++ b/ITS/AliITSVertexerZ.cxx
@@ -257,11 +257,12 @@ AliITSVertex* AliITSVertexerZ::FindVertexForCurrentEvent(Int_t evnumber){
       fZsig+=fZCombf->GetBinCenter(n)*fZCombf->GetBinCenter(n)*fZCombf->GetBinContent(n);
     }
     if(num<2){
-      cout<<"ATTENZIONE: num = "<<num<<"; n1= "<<n1<<"; n2 = "<<n2<<endl;
       fZsig = 0.;
     }
     else {
-      fZsig=TMath::Sqrt(fZsig/(num-1)-fZFound*fZFound/num/(num-1));
+      Float_t radi =  fZsig/(num-1)-fZFound*fZFound/num/(num-1);
+      if(radi>0.)fZsig=TMath::Sqrt(radi);
+      else fZsig=0.;
       fZFound/=num;
     }
     goon = TMath::Abs(TMath::Abs(fZFound-fZCombf->GetBinCenter(n1))-TMath::Abs(fZFound-fZCombf->GetBinCenter(n2)))>fTolerance;
-- 
2.43.5