message: Nicely initialize the variable every loop
  Backports from Flowee:
diff: @@ -109,7 +109,7 @@ DoubleSpendProof DoubleSpendProof::create(const CTransaction &t1, const CTransac
  size_t inputIndex2 = 0;
  for (; inputIndex1 < t1.vin.size(); ++inputIndex1) {
  const CTxIn &in1 = t1.vin.at(inputIndex1);
  - for (;inputIndex2 < t2.vin.size(); ++inputIndex2) {
  + for (inputIndex2 = 0;inputIndex2 < t2.vin.size(); ++inputIndex2) {
  const CTxIn &in2 = t2.vin.at(inputIndex2);
  if (in1.prevout == in2.prevout) {
  answer.m_prevOutIndex = in1.prevout.n;
  