Address warnings reported by MS VS

.gitignore

elfio/elfio_note.hpp

examples/anonymizer/anonymizer.cpp

examples/c_wrapper/c_example.c

examples/c_wrapper/elfio_c_wrapper.cpp

...4-Debug/.cmake/api/v1/query/client-MicrosoftVS/query.json

...ug/.cmake/api/v1/reply/cache-v2-134161540d16a3479721.json

...make/api/v1/reply/cmakeFiles-v1-99e161d2537750e67dc6.json

...cmake/api/v1/reply/codemodel-v2-4dc0844917cd96e9dbdf.json

...g/.cmake/api/v1/reply/index-2020-10-30T15-51-02-0595.json

.../reply/target-add_section-Debug-e54e8ec06570a83dec63.json

...1/reply/target-anonymizer-Debug-52141c5c55dcbbdd99a7.json

...v1/reply/target-c_example-Debug-6b476bfcaaace8e8db4f.json

...i/v1/reply/target-elfdump-Debug-894186a3032291477178.json

.../v1/reply/target-tutorial-Debug-f1cca834081650bc9ae3.json

...v1/reply/target-write_obj-Debug-08d85a609fa43e84a12f.json

...pi/v1/reply/target-writer-Debug-0a4075b4a96873dd70bd.json

out/build/x64-Debug/.ninja_deps

out/build/x64-Debug/.ninja_log

out/build/x64-Debug/VSInheritEnvironments.txt