htable: wrong printf format

[liviu-rolo]

"%*.s" used instead of "%.*s"

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally
• Related to issue #XXXX (replace XXXX with an open issue number)

Description

"%*.s" used instead of "%.*s": "The result is padded with space characters" (https://en.cppreference.com/w/cpp/io/c/fprintf)
Probably harmless (but still wrong) if the string ends with '\0'.

[henningw]

Thank you