message: initialize first_block_num for legacy blocks.log files
diff: @@ -147,6 +147,8 @@ namespace eosio { namespace chain {
  my->first_block_num = 0;
  my->block_stream.read( (char*)&my->first_block_num, sizeof(my->first_block_num) );
  EOS_ASSERT(my->first_block_num > 0, block_log_exception, "Block log is malformed, first recorded block number is 0 but must be greater than or equal to 1");
  + } else {
  + my->first_block_num = 1;
  }
  my->head = read_head();
  