message: history_plugin: fixing potential integer overflow
diff: @@ -346,7 +346,7 @@ namespace eosio {
  idump((start)(end));
  auto start_itr = idx.lower_bound( boost::make_tuple( n, start ) );
  - auto end_itr = idx.lower_bound( boost::make_tuple( n, end+1) );
  + auto end_itr = idx.upper_bound( boost::make_tuple( n, end) );
  auto start_time = fc::time_point::now();
  auto end_time = start_time;
  