message: Initialize variable in mode function
diff: @@ -51,14 +51,15 @@ struct ModeFunction {
  mask.SetInvalid(idx);
  return;
  }
  - T h_freq;
  - size_t freq = 0;
  -
  - for (auto &val : *state->frequency_map) {
  - if (val.second > freq) {
  - h_freq = val.first;
  - freq = val.second;
  - }
  + auto val = state->frequency_map->begin();
  + T h_freq = val->first;
  + size_t freq = val->second;
  + while (val != state->frequency_map->end()) {
  + if (val->second > freq) {
  + h_freq = val->first;
  + freq = val->second;
  + }
  + val++;
  }
  target[idx] = h_freq;
  }
  