message: Fixed possible compilation error
diff: @@ -31,19 +31,16 @@ CoinSpend::CoinSpend(
  GroupElement gs = (params->get_g() * coinSerialNumber).inverse();
  std::vector<GroupElement> C_;
  C_.reserve(anonymity_set.size());
  - std::size_t coinIndex;
  - bool indexFound = false;
  + std::size_t coinIndex = SIZE_MAX;
  for (std::size_t j = 0; j < anonymity_set.size(); ++j) {
  - if(anonymity_set[j] == coin.getPublicCoin()){
  + if(anonymity_set[j] == coin.getPublicCoin())
  coinIndex = j;
  - indexFound = true;
  - }
  C_.emplace_back(anonymity_set[j].getValue() + gs);
  }
  - if(!indexFound)
  + if(coinIndex == SIZE_MAX)
  throw ZerocoinException("No such coin in this anonymity set");
  sigmaProver.proof(C_, coinIndex, coin.getRandomness(), fPadding, sigmaProof);
  