simplewallet: fix "outputs in same tx" detector

It was comparing source txids, but txids were empty,
so all checks triggered

src/simplewallet/simplewallet.cpp

@@ -6072,6 +6072,7 @@ bool simple_wallet::print_ring_members(const std::vector<tools::wallet2::pending
         req.outputs[j].index = absolute_offsets[j];
       }
       COMMAND_RPC_GET_OUTPUTS_BIN::response res = AUTO_VAL_INIT(res);
+      req.get_txid = true;
       req.client = cryptonote::make_rpc_payment_signature(m_wallet->get_rpc_client_secret_key());
       bool r = m_wallet->invoke_http_bin("/get_outs.bin", req, res);
       err = interpret_rpc_response(r, res.status);