Fixes a bunch of bools missed in #11100

code/modules/spells/spell_code.dm

@@ -146,8 +146,8 @@ var/list/spells = typesof(/spell) //needed for the badmin verb for now
 			var/obj/effect/overlay/spell = new /obj/effect/overlay(location)
 			spell.icon = overlay_icon
 			spell.icon_state = overlay_icon_state
-			spell.anchored = 1
-			spell.density = 0
+			spell.anchored = TRUE
+			spell.density = FALSE
 			spawn(overlay_lifespan)
 				qdel(spell)
 	return valid_targets