Fix C warnings
Fix C warnings

appsignal/appsignal-ruby,matrinox/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal,appsignal/appsignal,appsignal/appsignal-ruby,appsignal/appsignal-ruby,matrinox/appsignal-ruby