message: Remove comment references to OS_WINDOWS.
diff: @@ -62,7 +62,7 @@ void Fail(const char* condition, const char* file, int line, const char* message
  std::strcat(buffer, backtraceBuffer);
  }
  }
  -#endif // OS_WINDOWS
  +#endif // _WIN32
  std::fprintf(stderr, buffer);
  @@ -87,7 +87,7 @@ void Fail(const char* condition, const char* file, int line, const char* message
  default: // Crash and break
  break;
  }
  -#endif // OS_WINDOWS
  +#endif // _WIN32
  if (!skipBreak)
  {
  