152f8a8ffe
Summary: `index` can be replaced by `iter`, saving the computation of `index++`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6406 Test Plan: make check Differential Revision: D19905056 Pulled By: cheng-chang fbshipit-source-id: add4638959c0d2e4e77a11f3fa04ffabaf0de790