message: graphene: Check for existing block not Tx
diff: @@ -95,7 +95,7 @@ bool CGrapheneBlockTx::HandleMessage(CDataStream &vRecv, CNode *pfrom)
  bool fAlreadyHave = false;
  {
  LOCK(cs_main);
  - fAlreadyHave = AlreadyHave(inv);
  + fAlreadyHave = AlreadyHaveBlock(inv);
  }
  if (fAlreadyHave)
  {
  