Added test for existence of the vertex (fixes crash)

(Philippe)

diff --git a/MUON/MUONmassPlot_ESD.C b/MUON/MUONmassPlot_ESD.C
index 21af0a13e271431b1924787b30a7e6eddd672ac3..b3c290afcc57e866edef7bfa53f2b3f489a83b72 100644 (file)
--- a/MUON/MUONmassPlot_ESD.C
+++ b/MUON/MUONmassPlot_ESD.C
@@ -116,7 +116,7 @@ Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t
 
   Int_t ntrackhits, nevents;
   Double_t fitfmin;
-  Double_t fZVertex;
+  Double_t fZVertex=0;
 
  
   TLorentzVector fV1, fV2, fVtot;
@@ -173,7 +173,7 @@ Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t
     }
 
     // get the SPD reconstructed vertex (vertexer) and fill the histogram
-    fZVertex = Vertex->GetZv();
+    if (Vertex) fZVertex = Vertex->GetZv();
     hPrimaryVertex->Fill(fZVertex);
 
     Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;