Fixes an error with the explosions-deleting-zone-air detection.
Kinetic gun can now break through mining tiles due to the goliath being able to possibly trap you in an unwinnable situation otherwise
More mob behavior vars in hostile animal, added Passtable to hivelord and brood and removed their environment smash

Conflicts:
	code/modules/mob/living/simple_animal/hostile/hostile.dm
compile fix