Merge pull request #11297 from Ghommie/Ghommie-cit597

some dozens lines about some update_overlays issues and cryopods/MMIs.

code/game/machinery/cell_charger.dm

@@ -18,7 +18,7 @@
 	if(!charging)
 		return
 
-	. += image(charging.icon, charging.icon_state)
+	. += mutable_appearance(charging.icon, charging.icon_state)
 	. += "ccharger-on"
 	if(!(stat & (BROKEN|NOPOWER)))
 		var/newlevel = round(charging.percent() * 4 / 100)

code/game/machinery/cloning.dm

@@ -491,29 +491,29 @@
 /obj/machinery/clonepod/update_overlays()
 	. = ..()
 	if(mess)
-		var/image/gib1 = image(CRYOMOBS, "gibup")
-		var/image/gib2 = image(CRYOMOBS, "gibdown")
+		var/mutable_appearance/gib1 = mutable_appearance(CRYOMOBS, "gibup")
+		var/mutable_appearance/gib2 = mutable_appearance(CRYOMOBS, "gibdown")
 		gib1.pixel_y = 27 + round(sin(world.time) * 3)
 		gib1.pixel_x = round(sin(world.time * 3))
 		gib2.pixel_y = 27 + round(cos(world.time) * 3)
 		gib2.pixel_x = round(cos(world.time * 3))
 		. += gib2
 		. += gib1
-		. += "cover-on"
 	else if(occupant)
-		var/image/occupant_overlay
+		var/mutable_appearance/occupant_overlay
 		var/completion = (flesh_number - unattached_flesh.len) / flesh_number
 
 		if(unattached_flesh.len <= 0)
-			occupant_overlay = image(occupant.icon, occupant.icon_state)
+			occupant_overlay = mutable_appearance(occupant.icon, occupant.icon_state)
 			occupant_overlay.copy_overlays(occupant)
+			. += "cover-on"
 		else
-			occupant_overlay = image(CRYOMOBS, "clone_meat")
+			occupant_overlay = mutable_appearance(CRYOMOBS, "clone_meat")
 			var/matrix/tform = matrix()
 			tform.Scale(completion)
 			tform.Turn(cos(world.time * 2) * 3)
 			occupant_overlay.transform = tform
-			occupant_overlay.appearance_flags = 0
+			occupant_overlay.appearance_flags = NONE
 
 		occupant_overlay.dir = SOUTH
 		occupant_overlay.pixel_y = 27 + round(sin(world.time) * 3)

code/game/machinery/cryopod.dm

@@ -287,6 +287,7 @@
 #define CRYO_PRESERVE 1
 #define CRYO_OBJECTIVE 2
 #define CRYO_IGNORE 3
+#define CRYO_DESTROY_LATER 4
 
 /obj/machinery/cryopod/proc/should_preserve_item(obj/item/I)
 	for(var/datum/objective_item/steal/T in control_computer.theft_cache)
@@ -308,8 +309,8 @@
 	if(iscyborg(mob_occupant))
 		var/mob/living/silicon/robot/R = mob_occupant
 		if(R.mmi?.brain)
-			cryo_items[R.mmi] = CRYO_IGNORE
-			cryo_items[R.mmi.brain] = CRYO_IGNORE
+			cryo_items[R.mmi] = CRYO_DESTROY_LATER
+			cryo_items[R.mmi.brain] = CRYO_DESTROY_LATER
 		for(var/obj/item/I in R.module) // the tools the borg has; metal, glass, guns etc
 			for(var/obj/item/O in I) // the things inside the tools, if anything; mainly for janiborg trash bags
 				cryo_items[O] = should_preserve_item(O)
@@ -318,7 +319,7 @@
 
 	//Drop all items into the pod.
 	for(var/obj/item/I in mob_occupant)
-		if(cryo_items[I] == CRYO_IGNORE)
+		if(cryo_items[I] == CRYO_IGNORE || cryo_items[I] ==CRYO_DESTROY_LATER)
 			continue
 		cryo_items[I] = should_preserve_item(I)
 		mob_occupant.transferItemToLoc(I, src, TRUE)
@@ -334,17 +335,19 @@
 		if(QDELETED(I)) //edge cases and DROPDEL.
 			continue
 		var/preserve = cryo_items[I]
-		if(preserve == CRYO_IGNORE)
+		if(preserve == CRYO_DESTROY_LATER)
 			continue
-		else if(preserve == CRYO_DESTROY)
-			qdel(I)
-		else if(control_computer?.allow_items)
-			control_computer.frozen_items += I
-			if(preserve == CRYO_OBJECTIVE)
-				control_computer.objective_items += I
-			I.moveToNullspace()
-		else
-			I.forceMove(loc)
+		if(preserve != CRYO_IGNORE)
+			if(preserve == CRYO_DESTROY)
+				qdel(I)
+			else if(control_computer?.allow_items)
+				control_computer.frozen_items += I
+				if(preserve == CRYO_OBJECTIVE)
+					control_computer.objective_items += I
+				I.moveToNullspace()
+			else
+				I.forceMove(loc)
+		cryo_items -= I
 
 	//Update any existing objectives involving this mob.
 	for(var/datum/objective/O in GLOB.objectives)
@@ -405,6 +408,10 @@
 		mob_occupant.ghostize(FALSE, penalize = TRUE)
 
 	QDEL_NULL(occupant)
+	for(var/I in cryo_items) //only "CRYO_DESTROY_LATER" atoms are left)
+		var/atom/A = I
+		if(!QDELETED(A))
+			qdel(A)
 	open_machine()
 	name = initial(name)
 
@@ -412,6 +419,7 @@
 #undef CRYO_PRESERVE
 #undef CRYO_OBJECTIVE
 #undef CRYO_IGNORE
+#undef CRYO_DESTROY_LATER
 
 /obj/machinery/cryopod/MouseDrop_T(mob/living/target, mob/user)
 	if(!istype(target) || user.incapacitated() || !target.Adjacent(user) || !Adjacent(user) || !ismob(target) || (!ishuman(user) && !iscyborg(user)) || !istype(user.loc, /turf) || target.buckled)