[ethereum/go-ethereum] eth: use intermediate variable for better readability (#17510)

You can view, comment on, or merge this pull request online at:

https://github.com/ethereum/go-ethereum/pull/17510

— Commit Summary —

* eth: use intermediate variable for better readability

— File Changes —

M eth/downloader/downloader.go (12)

— Patch Links —

https://github.com/ethereum/go-ethereum/pull/17510.patch
https://github.com/ethereum/go-ethereum/pull/17510.diff