Fix freezer causing error when unfreezing without owner

[Aws0mee]

Fixes #2478

[Vurv78]

Does the CanPlayerUnfreeze hook also need this check?

[Aws0mee]

Does the CanPlayerUnfreeze hook also need this check?

No, it does not appear to cause any errors from my testing. Refer to #2478

[thegrb93]

Can you just put an if not IsValid(self:GetPlayer()) then return end at the top of the triggerinput? Pretty sure the other hooks in there will want it.

[Aws0mee]

Can you just put an if not IsValid(self:GetPlayer()) then return end at the top of the triggerinput? Pretty sure the other hooks in there will want it.

I can do that, but I feel like there could be cases where we would still want it to work if the owner disconnects. Additionally I saw someone say they set up permanent wire contraptions somewhere in a github issue, so that could interfere with something like that.

[thegrb93]

The only way it will ever work if owner disconnects is if gmod ever got a decent prop protection that works by steamid checks when the owner is disconnected, but I don't see that ever happening.

[Aws0mee]

The only way it will ever work if owner disconnects is if gmod ever got a decent prop protection that works by steamid checks when the owner is disconnected, but I don't see that ever happening.

Fair enough, I changed it.