Cheng Chang 43aee93d2b Initialize scratch to nullptr explicitly to make clang analyzer happy (#6577)
Summary:
`scratch` is not initialized in `Align` because it will be set outside of it. But clang analyzer is strict on initializing it before return.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6577

Test Plan: make analyze

Reviewed By: siying

Differential Revision: D20607303

Pulled By: cheng-chang

fbshipit-source-id: 2843d759345a057a8e122178d30b90deff0f9b2a
2020-03-23 20:15:27 -07:00
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