Fix use of uninitialized memory

Bench.cpp

@@ -679,6 +679,7 @@ template <class ConflictSet_> void benchConflictSet(const std::string &name) {
       w.begin.len = r.begin.len;
       w.end.p = r.end.p;
       w.end.len = 0;
+      w.writeVersion = version + 1;
       writes.push_back(w);
     }
     cs.addWrites(writes.data(), writes.size());