Ports the radiation subsystem and cleans up damage flags. (#15715)

code/game/objects/objs.dm

@@ -13,7 +13,7 @@
 	var/sharp = 0		// whether this object cuts
 	var/edge = FALSE	// whether this object is more likely to dismember
 	var/in_use = 0 // If we have a user using us, this will be set on. We will check if the user has stopped using us, and thus stop updating and LAGGING EVERYTHING!
-	var/damtype = BRUTE
+	var/damtype = DAMAGE_BRUTE
 	var/force = 0
 	var/armor_penetration = 0
 	var/noslice = 0 // To make it not able to slice things.
@@ -251,8 +251,8 @@
 /obj/proc/damage_flags()
 	. = 0
 	if(has_edge(src))
-		. |= DAM_EDGE
+		. |= DAMAGE_FLAG_EDGE
 	if(is_sharp(src))
-		. |= DAM_SHARP
-		if(damtype == BURN)
-			. |= DAM_LASER
+		. |= DAMAGE_FLAG_SHARP
+		if(damtype == DAMAGE_BURN)
+			. |= DAMAGE_FLAG_LASER