ignore: simplify parallel worker initialization
ignore: simplify parallel worker initialization

We can just ask the channel whether any work has been loaded. Normally
querying a channel for its length is a strong predictor of bugs, but in
this case, we do it before we ever attempt a `recv`, so it should work.

Kudos to @zsugabubus for suggesting this!

BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep