Merge pull request #2403 from AntelopeIO/uint128array_true_lowest_50

[5.0] fix `true_lowest()` for `uint128[2]` index; possibly resolving some secondary table row RPC queries

libraries/chain/include/eosio/chain/contract_table_objects.hpp

@@ -177,7 +177,7 @@ namespace eosio { namespace chain {
       using value_type = std::array<uint128_t, N>;
 
       static value_type true_lowest() {
-         value_type arr;
+         value_type arr = {};
          return arr;
       }