Make sure the TTreeCloner properly carry forward the value of the...

Make sure the TTreeCloner properly carry forward the value of the kDoNotUseBufferMap bit in the branch (Addendum to r38801)


git-svn-id: http://root.cern.ch/svn/root/trunk@39755 27541ba8-7e3a-0410-8455-c3a389f83636

tree/tree/src/TTreeCloner.cxx

@@ -306,6 +306,10 @@ UInt_t TTreeCloner::CollectBranches(TBranch *from, TBranch *to) {
    }
 
    fFromBranches.AddLast(from);
+   if (!from->TestBit(TBranch::kDoNotUseBufferMap)) {
+      // Make sure that we reset the Buffer's map if needed.
+      to->ResetBit(TBranch::kDoNotUseBufferMap);
+   }
    fToBranches.AddLast(to);
 
    numBaskets += from->GetWriteBasket();