fix: remove memory leak in `vector.c`

[vil02]

Description of Change

There is a memory leak in vector.c. This PR fixes it (and removes some trailing spaces). The Awesome CI Workflow passes on my end.

References

Checklist

• [x] Added description of change
• [x] PR title follows semantic commit guidelines
• [x] Search previous suggestions before making a new one, as yours may be a duplicate.
• [x] I acknowledge that all my contributions will be made under the project's license.

Notes: Removes memory leak in vector.c.

[github-actions[bot]]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[vil02]

@Panquesito7, @tjgurwara99, @alexpantyukhin could some of you please add a dont-close or approved label?