message: graphene: do not penalaize peer for requesting non-existing block
diff: @@ -1419,7 +1419,6 @@ bool HandleGrapheneBlockRequest(CDataStream &vRecv, CNode *pfrom, const CChainPa
  BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
  if (mi == mapBlockIndex.end())
  {
  - dosMan.Misbehaving(pfrom, 100);
  return error(
  "Peer %s (%d) requested nonexistent block %s", pfrom->addrName.c_str(), pfrom->id, inv.hash.ToString());
  }
  