Fix saving vote for post/discussion created by deleted user

[rob006]

This fixes an error when someone is trying to vote on discussion created by user, that was deleted.

2026-03-18 13:59:23] flarum.ERROR: TypeError: Argument 5 passed to FoF\Gamification\Listeners\SaveVotesToDatabase::vote() must be an instance of Flarum\User\User, null given, called in /home/xxx/project/forum/vendor/fof/gamification/src/Listeners/SaveVotesToDatabase.php on line 94 and defined in /home/xxx/project/forum/vendor/fof/gamification/src/Listeners/SaveVotesToDatabase.php:99
Stack trace:
#0 /home/xxx/project/forum/vendor/fof/gamification/src/Listeners/SaveVotesToDatabase.php(94): FoF\Gamification\Listeners\SaveVotesToDatabase->vote()
#1 /home/xxx/project/forum/vendor/illuminate/events/Dispatcher.php(424): FoF\Gamification\Listeners\SaveVotesToDatabase->handle()

[DavideIadeluca]

Thanks @rob006. Tagged as v1.6.12. Might you be able to open a 2.x PR for this issue as well?

[rob006]

I don't have an environment to test this on 2.x, but I suspect that 2.x is not affected by this bug - this param is not present in 2.x version:

gamification/src/Api/PostResourceFields.php

Line 119 in ac28834

public function vote(Post $post, ?string $voteValue, User $actor): void