Fixed some major incompetency from 2018.

// If someone will place 0 of some gas there, SHIT WILL BREAK. Do not do that.
LINDA_turf_tile.dm, line 16.

code/modules/awaymissions/mission_code/snowdin.dm

@@ -162,7 +162,7 @@
 	name = "liquid plasma"
 	desc = "A flowing stream of chilled liquid plasma. You probably shouldn't get in."
 	icon_state = "liquidplasma"
-	initial_gas_mix = "o2=0;n2=82;plasma=24;TEMP=120"
+	initial_gas_mix = "n2=82;plasma=24;TEMP=120"
 	baseturfs = /turf/open/lava/plasma
 	slowdown = 2
 

code/modules/mob/living/simple_animal/hostile/tree.dm

@@ -54,7 +54,7 @@
 				if(prob(25))
 					var/amt = min(co2, 9)
 					T.air.adjust_moles(/datum/gas/carbon_dioxide, -amt)
-					T.atmos_spawn_air("o2=[amt]")
+					T.atmos_spawn_air("o2=[amt];TEMP=293.15")
 
 /mob/living/simple_animal/hostile/tree/AttackingTarget()
 	. = ..()