message: Add missing lock to IsBlockInFlight()
diff: @@ -185,6 +185,7 @@ bool ThinTypeRelay::AreTooManyBlocksInFlight(CNode *pfrom, const std::string thi
  bool ThinTypeRelay::IsBlockInFlight(CNode *pfrom, const std::string thinType, const uint256 &hash)
  {
  // check if this node already has this thinType of block in flight.
  + LOCK(cs_inflight);
  auto range = mapThinTypeBlocksInFlight.equal_range(pfrom->GetId());
  while (range.first != range.second)
  {
  