Check also the lower boundary of the array

diff --git a/TPC/AliTPC.cxx b/TPC/AliTPC.cxx
index 14bd389c2c55cd9dd16678584276e8cf25560c14..372e8fd2130e84ee473937767101d672dd507ec3 100644 (file)
--- a/TPC/AliTPC.cxx
+++ b/TPC/AliTPC.cxx
@@ -764,7 +764,7 @@ void    AliTPC::SetActiveSectors(Int_t flag)
       br2->GetEvent(track);
       Int_t *volumes = fTrackHits->GetVolumes();
       for (Int_t j=0;j<fTrackHits->GetNVolumes(); j++) {
-       if (volumes[j]<fTPCParam->GetNSector()) {
+       if (volumes[j]>-1 && volumes[j]<fTPCParam->GetNSector()) {
          fActiveSectors[volumes[j]]=kTRUE;
        }
        else {