Merge pull request #5014 from Citadel-Station-13/upstream-merge-34314

[MIRROR] Datum var cleanup

code/game/atoms.dm

@@ -26,13 +26,14 @@
 
 	var/datum/proximity_monitor/proximity_monitor
 	var/buckle_message_cooldown = 0
+	var/fingerprintslast
 
 /atom/New(loc, ...)
 	//atom creation method that preloads variables at creation
 	if(GLOB.use_preloader && (src.type == GLOB._preloader.target_path))//in case the instanciated atom is creating other atoms in New()
 		GLOB._preloader.load(src)
 
-	if(use_tag)
+	if(datum_flags & DF_USE_TAG)
 		GenerateTag()
 
 	var/do_initialize = SSatoms.initialized

code/game/gamemodes/nuclear/nuclearbomb.dm

@@ -79,14 +79,14 @@
 	anchored = TRUE //stops it being moved
 
 /obj/machinery/nuclearbomb/syndicate
-	use_tag = TRUE
+	datum_flags = DF_USE_TAG
 	//ui_style = "syndicate" // actually the nuke op bomb is a stole nt bomb
 
 /obj/machinery/nuclearbomb/syndicate/GenerateTag()
 	var/obj/machinery/nuclearbomb/existing = locate("syndienuke") in GLOB.nuke_list
 	if(existing)
 		stack_trace("Attempted to spawn a syndicate nuke while one already exists at [COORD(existing.loc)]")
-		use_tag = FALSE
+		datum_flags &= ~DF_USE_TAG
 		return
 	tag = "syndienuke"