message: yoda style code fix.
  Commit Message: Fixed yoda style code.
diff: @@ -168,7 +168,7 @@ void DispatcherImpl::deferredDelete(DeferredDeletablePtr&& to_delete) {
  ASSERT(isThreadSafe());
  current_to_delete_->emplace_back(std::move(to_delete));
  ENVOY_LOG(trace, "item added to deferred deletion list (size={})", current_to_delete_->size());
  - if (1 == current_to_delete_->size()) {
  + if (current_to_delete_->size() == 1) {
  deferred_delete_cb_->scheduleCallbackCurrentIteration();
  }
  }
  