Extinguishing Structures

[west3436]

What this does

Spray from extinguishers will now properly extinguish structures like bookcases, clown carts, etc.

Why it's good

Without this PR, it's currently impossible to extinguish fires on and under things like bookcases, clowncars, etc. Closes #36559.

Changelog

:cl:

• bugfix: Dense structures such as bookcases or clowncars can now be extinguished.

[west3436]

Not sure if the Bumped() check is even necessary here - need to test it this evening.

[hacker-on-steroids]

sort of related - acid kudzu melts walls into girders which block weedspray also