core: fix input ordering from v7

src/cryptonote_core/cryptonote_tx_utils.cpp

@@ -281,7 +281,7 @@ namespace cryptonote
     std::sort(ins_order.begin(), ins_order.end(), [&](const size_t i0, const size_t i1) {
       const txin_to_key &tk0 = boost::get<txin_to_key>(tx.vin[i0]);
       const txin_to_key &tk1 = boost::get<txin_to_key>(tx.vin[i1]);
-      return memcmp(&tk0.k_image, &tk1.k_image, sizeof(tk0.k_image)) < 0;
+      return memcmp(&tk0.k_image, &tk1.k_image, sizeof(tk0.k_image)) > 0;
     });
     tools::apply_permutation(ins_order, [&] (size_t i0, size_t i1) {
       std::swap(tx.vin[i0], tx.vin[i1]);