Fix suit coolers and exosuits for IPCs (#13867)

code/controllers/subsystems/mob.dm

@@ -8,6 +8,8 @@
 	var/list/slept = list()
 
 	var/list/currentrun = list()
+	var/list/processing = list()
+
 	var/list/all_rats = list()	// Contains all *living* rats.
 	var/list/mannequins = list()	//Contains all mannequins used by character preview
 	var/list/greatworms = list()
@@ -65,12 +67,24 @@
 /datum/controller/subsystem/mobs/fire(resumed = 0)
 	if (!resumed)
 		src.currentrun = mob_list.Copy()
+		src.currentrun += processing.Copy()
 
 	var/list/currentrun = src.currentrun
 
 	while (currentrun.len)
-		var/mob/M = currentrun[currentrun.len]
+		var/datum/thing = currentrun[currentrun.len]
 		currentrun.len--
+		if(!ismob(thing))
+			if(!QDELETED(thing))
+				if(thing.process(wait, times_fired) == PROCESS_KILL)
+					stop_processing(thing)
+			else
+				processing -= thing
+			if (MC_TICK_CHECK)
+				return
+			continue
+
+		var/mob/M = thing
 
 		if (QDELETED(M))
 			log_debug("SSmob: QDELETED mob [DEBUG_REF(M)] left in processing list!")
@@ -108,3 +122,7 @@
 	var/mannequin = mannequins[ckey]
 	qdel(mannequin)
 	mannequins -= ckey
+
+// Helper so PROCESS_KILL works.
+/datum/controller/subsystem/mobs/proc/stop_processing(datum/D)
+	STOP_PROCESSING(src, D)