d263505417
Summary: If a column family has 0 levels, then existing `TestCompactFiles(...)` may hit divide-by-zero. To fix, return early if the cf is empty. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9086 Test Plan: TBD Reviewed By: ajkr Differential Revision: D31986799 Pulled By: riversand963 fbshipit-source-id: 48f7dfb2b2b47cfc1315cb71ca80eb230d947f17