src/native/platform/OSDetection.c: Fixed warnings and errors
src/native/platform/OSDetection.c: Fixed warnings and errors

I fixed the prototype declaration warnings that clang generated as well as
fixed an error where OSIsNintendo should be OSIsNintendoConsole

DrItanium/electron-platform,DrItanium/electron,DrItanium/electron,DrItanium/AdventureEngine,DrItanium/AdventureEngine,DrItanium/electron,DrItanium/electron-platform,DrItanium/neutron,DrItanium/electron-platform