Add a missing "once" in .h

Summary: Closes https://github.com/facebook/rocksdb/pull/2670

Differential Revision: D5529018

Pulled By: siying

fbshipit-source-id: 10a378933d509035d2dbe502247dd85fcea09789
This commit is contained in:
Siying Dong 2017-07-31 12:00:02 -07:00 committed by Facebook Github Bot
parent 21696ba502
commit a84cee8127

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@ -3,6 +3,8 @@
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
namespace rocksdb {
// The helper function to assert the move from dynamic_cast<> to
// static_cast<> is correct. This function is to deal with legacy code.