message: redis protocol compatible
diff: @@ -47,7 +47,7 @@ void GeoAddCmd::DoInitial(PikaCmdArgsType &argv, const CmdInfo* const ptr_info)
  void GeoAddCmd::Do() {
  nemo::Status s;
  - int64_t response = 0, ret;
  + int64_t count = 0, ret;
  bool exist = false;
  const std::shared_ptr<nemo::Nemo> db = g_pika_server->db();
  std::vector<GeoPoint>::const_iterator iter = pos_.begin();
  @@ -68,16 +68,16 @@ void GeoAddCmd::Do() {
  }
  s = db->ZAdd(key_, score, iter->name, &ret);
  if (s.ok() && !exist) {
  - response = 1;
  + count += 1;
  } else if (s.ok() && exist) {
  - response = 0;
  +
  } else {
  res_.SetRes(CmdRes::kErrOther, s.ToString());
  return;
  }
  }
  SlotKeyAdd("z", key_);
  - res_.AppendInteger(response);
  + res_.AppendInteger(count);
  return;
  }
  