[set ops L/L] fix unused variable warnings produced with clang++ with -Wextra
[test][set ops L/L] fix unused variable warnings produced with clang++ and -Wextra
[test] fix unused variable warnings produced with clang++ and -Wextra
Merge branch 'develop' of https://github.com/boostorg/geometry into feature/setops
Merge pull request #28 from mkaravel/feature/setops

Merged from Feature/setops to avoid warnings about unused variables