message: Fixed trivial warning in the file.
  Fixed some warnings in the file.
diff: @@ -135,7 +135,7 @@ TfLiteStatus ArenaPlanner::PlanAllocations() {
  }
  // Count references to node input tensors.
  - for (int i = 0; i < graph_info_->num_nodes(); ++i) {
  + for (size_t i = 0; i < graph_info_->num_nodes(); ++i) {
  const TfLiteNode& node = graph_info_->node(i);
  TfLiteIntArray* node_inputs = node.inputs;
  for (int j = 0; j < node_inputs->size; ++j) {
  @@ -153,7 +153,7 @@ TfLiteStatus ArenaPlanner::PlanAllocations() {
  }
  }
  // Go through the graph in execution order.
  - for (int i = 0; i < graph_info_->num_nodes(); ++i) {
  + for (size_t i = 0; i < graph_info_->num_nodes(); ++i) {
  const TfLiteNode& node = graph_info_->node(i);
  // First queue output tensors for allocation.
  @@ -193,7 +193,7 @@ TfLiteStatus ArenaPlanner::ExecuteAllocations(int first_node, int last_node) {
  TF_LITE_ENSURE_STATUS(CalculateAllocations(first_node, last_node));
  TF_LITE_ENSURE_STATUS(Commit());
  - for (int i = 0; i < graph_info_->num_tensors(); ++i) {
  + for (size_t i = 0; i < graph_info_->num_tensors(); ++i) {
  // TODO(ahentz): we could do this only for the tensors that were modified
  // in CalculateAllocations(), instead of redoing it for tensors that
  // already had proper pointers. However we must be very careful, because
  