Don't release spores when destroyed by fire

[PatrikLundell]

Summary

None

Purpose of change

Fix #77743, i.e. destruction of fungal terrain by fire triggers spore release.

Describe the solution

Add condition that whatever is "bashed" mustn't be on fire to be able to release spores (either the spores are long since consumed by the fire, or they catch fire and are destroyed on release).

Describe alternatives you've considered

Convoluted passing of a parameter down the call chain to say that "bashing" shouldn't cause fungal spores to be released (because destruction of the thing was caused by fire, so there are no undamaged spores left to release).

Testing

• Loaded a save.
• Teleported to a fungal tower.
• Debug killed the critters around to be able to work in peace.
• Debug spawned a sledge hammer and STR to 200.
• Bashed fungal patch until it was destroyed and released spores.
• Set fire to a fungal patch and the fungal tower area.
• Waited.
• Saw the fire spread and the fungal stuff burned, without lots of spore spreading.

Additional context

The implementation should mean that if you set fungal stuff on fire before bashing them they won't release spores, even though your bashing may beat the fire to the destruction. I think that case is too niche to be worth the trouble to make sure destruction is actually by fire.