Adding missing protection if no data - AliTPCCalibViewerGUI.cxx AliTPCCalibViewe...

[u/mrichter/AliRoot.git] / TPC / AliTPCCalibViewer.cxx

diff --git a/TPC/AliTPCCalibViewer.cxx b/TPC/AliTPCCalibViewer.cxx
index d651fb4c7414743e6a837ec1374ef380c712b838..cd1f9629afb2ead0f82b9eb82a0cfddd9606b6fc 100644 (file)
--- a/TPC/AliTPCCalibViewer.cxx
+++ b/TPC/AliTPCCalibViewer.cxx
@@ -1566,6 +1566,7 @@ TObjArray* AliTPCCalibViewer::GetListOfVariables(Bool_t printList) {
   //
    TObjArray* arr = new TObjArray();
    TObjString* str = 0;
+   if (!fTree) return 0;
    Int_t nentries = fTree->GetListOfBranches()->GetEntries();
    for (Int_t i = 0; i < nentries; i++) {
       str = new TObjString(fTree->GetListOfBranches()->At(i)->GetName());