[clang] DeltaTree::AddDelta - fix "initialization is never read" clang-tidy warning. NFCI.

Author: RKSimon

clang/lib/Rewrite/DeltaTree.cpp

@@ -458,7 +458,10 @@ void DeltaTree::AddDelta(unsigned FileIndex, int Delta) {
 
   DeltaTreeNode::InsertResult InsertRes;
   if (MyRoot->DoInsertion(FileIndex, Delta, &InsertRes)) {
-    Root = MyRoot = new DeltaTreeInteriorNode(InsertRes);
+    Root = new DeltaTreeInteriorNode(InsertRes);
+#ifdef VERIFY_TREE
+    MyRoot = Root;
+#endif
   }
 
 #ifdef VERIFY_TREE