Yanqin Jin 7fb39f1ae1 Fix a warning against implicit type conversion (#4593)
Summary:
Test plan
```
$USE_CLANG=1 make -j32 all check
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4593

Differential Revision: D12811159

Pulled By: riversand963

fbshipit-source-id: 5e3bbe058c5a8d5a286a19d7643593fc154a2d6d
2018-10-29 09:54:36 -07:00
..
2017-12-01 10:42:05 -08:00
2017-08-03 15:56:46 -07:00
2018-01-29 12:56:42 -08:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-08-03 15:56:46 -07:00
2017-08-03 15:56:46 -07:00
2018-08-09 14:29:11 -07:00
2018-08-09 14:29:11 -07:00
2017-08-03 15:56:46 -07:00
2018-01-29 12:56:42 -08:00
2017-08-03 15:56:46 -07:00
2017-08-03 15:56:46 -07:00