message: add missing constructor for CThinBlockInFlight()
diff: @@ -350,6 +350,12 @@ public:
  {
  int64_t nRequestTime;
  bool fReceived;
  +
  + CThinBlockInFlight()
  + {
  + nRequestTime = GetTime();
  + fReceived = false;
  + }
  };
  // socket
  