Revert "Fixes the recent revert (#4542)"

This reverts commit d5aa313.

code/__DEFINES/subsystems.dm

@@ -95,6 +95,7 @@ if (Datum.is_processing) {\
 	SSmachines.List += Datum;\
 }
 
+//stopProcessingWrapper catches removal from processing list before it happens to adjust last position in memory during resumes
 #define STOP_PROCESSING_IN_LIST(Datum, List) \
 if(Datum.is_processing) {\
 	if(SSmachines.List.Remove(Datum)) {\

code/controllers/subsystems.dm

@@ -45,6 +45,9 @@
 /datum/controller/subsystem/proc/PreInit()
 	return
 
+/datum/controller/subsystem/proc/stopProcessingWrapper() //called before a thing stops being processed
+	return
+
 //This is used so the mc knows when the subsystem sleeps. do not override.
 /datum/controller/subsystem/proc/ignite(resumed = 0)
 	set waitfor = 0

code/controllers/subsystems/machines.dm

@@ -119,7 +119,6 @@ datum/controller/subsystem/machines/proc/setup_atmos_machinery(list/machines)
 		current_run.Cut(1, 2)
 		if(istype(PN) && !QDELETED(PN))
 			PN.Process(wait)
-		else
 			pipenets.Remove(PN)
 			PN.is_processing = null
 		if(MC_TICK_CHECK)
@@ -137,7 +136,6 @@ datum/controller/subsystem/machines/proc/setup_atmos_machinery(list/machines)
 		if(istype(M) && !QDELETED(M) && !(M.Process(wait) == PROCESS_KILL))
 			if(M.use_power)
 				M.auto_use_power()
-		else
 			machinery.Remove(M)
 			M.is_processing = null
 		if(MC_TICK_CHECK)
@@ -153,7 +151,6 @@ datum/controller/subsystem/machines/proc/setup_atmos_machinery(list/machines)
 		current_run.Cut(1, 2)
 		if(istype(PN) && !QDELETED(PN))
 			PN.reset(wait)
-		else
 			powernets.Remove(PN)
 			PN.is_processing = null
 		if(MC_TICK_CHECK)