Restyle cleanup: Small improvements found by PVS Studio.

[restyled-io[bot]]

A duplicate of #2666 with additional commits that automatically address incorrect style, created by Restyled.

Since the original Pull Request was opened as a fork in a contributor's repository, we are unable to create a Pull Request branching from it with only the style fixes.

The following Restylers made fixes:

• clang-format

To incorporate these changes, you can either:

1. Merge this Pull Request instead of the original, or

2. Ask your contributor to locally incorporate these commits and push them to the original Pull Request

   Expand for example instructions

   ```console git remote add upstream https://github.com/TokTok/c-toxcore.git git fetch upstream pull//head git merge --ff-only FETCH_HEAD git push ```

NOTE: As work continues on the original Pull Request, this process will re-run and update (force-push) this Pull Request with updated style fixes as necessary. If the style is fixed manually at any point (i.e. this process finds no fixes to make), this Pull Request will be closed automatically.

Sorry if this was unexpected. To disable it, see our documentation.

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This change is 

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (9fe18b1) 73.75% compared to head (868d119) 73.73%. Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2667 +/- ## ========================================== - Coverage 73.75% 73.73% -0.02% ========================================== Files 148 148 Lines 30481 30468 -13 ========================================== - Hits 22480 22467 -13 Misses 8001 8001 ```

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