codeql/cpp/old-change-notes/2021-02-04-unsigned-difference-expression-compared-zero.md

lgtm

• A new query (cpp/unsigned-difference-expression-compared-zero) is run but not yet displayed on LGTM. The query finds unsigned subtractions used in relational comparisons with the value 0. This query was originally submitted as an experimental query by @ihsinme in https://github.com/github/codeql/pull/4745.