message: Add missing lock: cs_objDownloader in FindNextBlocksToDownload()
diff: @@ -939,7 +939,13 @@ void CRequestManager::UpdateBlockAvailability(NodeId nodeid, const uint256 &hash
  void CRequestManager::RequestNextBlocksToDownload(CNode *pto)
  {
  - int nBlocksInFlight = mapRequestManagerNodeState[pto->GetId()].nBlocksInFlight;
  + AssertLockHeld(cs_main);
  +
  + int nBlocksInFlight = 0;
  + {
  + LOCK(cs_objDownloader);
  + nBlocksInFlight = mapRequestManagerNodeState[pto->GetId()].nBlocksInFlight;
  + }
  if (!pto->fDisconnectRequest && !pto->fDisconnect && !pto->fClient &&
  nBlocksInFlight < (int)pto->nMaxBlocksInTransit)
  {
  