Fix index initialization and loop termination condition of LockFreePool's remove method

[nox213]

Hi, I'm reading your book these days (thanks for your interesting book) , and I ran into the error below while I was running LockFreePool example.

I think the reason is because the existing implementation incorrectly terminates the loop without checking the bucket at the starting index (start). So, I fixed it by modifying the loop to do-while from while and initializing i with start instead of (start + 1) % buckets.length. It will ensure that the bucket at the starting index is also considered during the scan.

[axel22]

Yes, from looking at the code, that looks like a correct analysis and the right fix as far as I can see. Thank you for the patch!