Fix helicopters silently failing to ascend

[chaosvolt]

Summary

SUMMARY: Bugfixes "Helicopters now print a message on failing to ascend due to lack of engine power, instead of silent failure"

Purpose of change

I'd been wanting to figure out how to fix the annoyance where helicopters would fail silently, with no message, if you tried to ascend but couldn't due to lack of power. It took a lot of rooting through a fairly complex chain of functions, giving up, then working through the opposite direction by figuring out what actually happens internally when you press <, before I finally found how to fix that.

Describe the solution

Updated game::handle_action so that triggering the ACTION_MOVE_UP will check for if you're in the circumstance of a helicopter trying and failing to ascend, and if so print a message to hint at the problem.

Describe alternatives you've considered

Continue going in circles looking at how the vehicle move functions seem to go back and forth until I go insane.

Testing

1. Compiled and load-tested.
2. Spawned in a small helicoper, modified it to have enough cargo space to load the back with a bunch of anvils.
3. Start it up and tried to ascend, observed it failed with an actual message instead of silently.
4. Ditched the anvil collection, observed it ascended as normal.
5. Ran affected file through astyle.

Additional context

[Coolthulhu]

There's a break right after the block, no need for extra one.