code: private int calcFuByJanto() {
          Tile jantoTile = comp.getJanto().getTile();
          int tmp = 0;
          if (jantoTile == generalSituation.getBakaze()) {
              tmp += 2;
          }
          if (jantoTile == personalSituation.getJikaze()) {
              tmp += 2;
          }
          if (jantoTile.getType() == SANGEN) {
              tmp += 2;
          }
          return tmp;
      }
docs: 雀頭の種類による加符
  連風牌の場合は+4とします
  
  @return