fix cellphone

[PatrikLundell]

Summary

None

Purpose of change

Fix #78535, i.e. game crashing on cell phone toggling.

Describe the solution

Add link action to the active cell phone as well, as the crash happens when checking for the existence of link data, but then failing to find a link action.

Describe alternatives you've considered

Change the code to verify link action is also available in order to process link data. However, it makes sense that you should be able to plug it in regardless of whether it's on or off, and there might be other things that actually shouldn't be possible to plug in during use.

Testing

Loading the save provided by @moxian, (since the bug report itself didn't bother to provide one) and then turning the cell phone on and off until the battery ran out. Activated the plug in action once while the phone was on, but didn't actually plug it in anywhere (my action aborted the process).

Additional context

[moxian]

I mentioned it in the issue in passing, and this is definitely out of scope of the current PR, but perhaps we should add some consistency checks to the link_up / transform actions so that this sort of bug can be caught at PR time rather than play time.

Yes, there might be some things that shouldn't be plugged during use, but as it stands, having those things is grounds for a segfault, soo... But I guess that would need C++ changes either way...