`isdigit()` takes a char/int, not a char*. [Originally mentioned here]( https://github.com/networkupstools/nut/commit/9a40084a5c756fa47c436819c2b15c41fa91d93a#commitcomment-32558936), but we need to fix this before the next release.
isdigit()takes a char/int, not a char*.Originally mentioned here, but we need to fix this before the next release.