message: make store_i128i128 to work like store_i64
diff: @@ -372,11 +372,9 @@ int32_t apply_context::store_i128i128( Name scope, Name table, uint128_t primary
  if( obj ) {
  wlog( "modify" );
  mutable_db.modify( *obj, [&]( auto& o ) {
  - o.primary_key = primary;
  - o.secondary_key = secondary;
  o.value.assign(value, valuelen);
  });
  - return valuelen;
  + return 0;
  } else {
  wlog( "new" );
  mutable_db.create<key128x128_value_object>( [&](auto& o) {
  