Saves a bit of memory per decal (#48985)

code/__DEFINES/cleaning.dm

@@ -9,6 +9,8 @@
 #define CLEAN_IMPRESSIVE	5
 /// Cleans things spotless down to the atomic structure
 #define CLEAN_GOD			6
+/// Never cleaned
+#define CLEAN_NEVER 7
 
 //How strong things have to be to wipe forensic evidence...
 #define CLEAN_STRENGTH_FINGERPRINTS CLEAN_IMPRESSIVE

code/datums/components/decal.dm

@@ -7,7 +7,7 @@
 
 	var/first_dir // This only stores the dir arg from init
 
-/datum/component/decal/Initialize(_icon, _icon_state, _dir, _cleanable=CLEAN_GOD, _color, _layer=TURF_LAYER, _description, _alpha=255)
+/datum/component/decal/Initialize(_icon, _icon_state, _dir, _cleanable=CLEAN_NEVER, _color, _layer=TURF_LAYER, _description, _alpha=255)
 	if(!isatom(parent) || !generate_appearance(_icon, _icon_state, _dir, _layer, _color, _alpha))
 		return COMPONENT_INCOMPATIBLE
 	first_dir = _dir
@@ -19,7 +19,7 @@
 /datum/component/decal/RegisterWithParent()
 	if(first_dir)
 		RegisterSignal(parent, COMSIG_ATOM_DIR_CHANGE, .proc/rotate_react)
-	if(cleanable)
+	if(cleanable != CLEAN_NEVER)
 		RegisterSignal(parent, COMSIG_COMPONENT_CLEAN_ACT, .proc/clean_react)
 	if(description)
 		RegisterSignal(parent, COMSIG_PARENT_EXAMINE, .proc/examine)

code/game/objects/effects/decals/decal.dm

@@ -45,4 +45,4 @@
 	var/turf/T = loc
 	if(!istype(T)) //you know this will happen somehow
 		CRASH("Turf decal initialized in an object/nullspace")
-	T.AddComponent(/datum/component/decal, icon, icon_state, dir, CLEAN_GOD, color, null, null, alpha)
+	T.AddComponent(/datum/component/decal, icon, icon_state, dir, CLEAN_NEVER, color, null, null, alpha)