Wizards can no longer de-jaunt in turfs with dense objects.

Also fixes an exploit where wizards could cast CentCom restricted spells by hiding inside objects, such as lockers or coffins.

code/game/turfs/turf.dm

@@ -388,3 +388,11 @@
 
 /turf/proc/process()
 	return PROCESS_KILL
+
+/turf/proc/contains_dense_objects()
+	if(density)
+		return 1
+	for(var/atom/A in src)
+		if(A.density && !(A.flags & ON_BORDER))
+			return 1
+	return 0

code/modules/clothing/spacesuits/rig/modules/ninja.dm

@@ -119,10 +119,8 @@
 		H << "<span class='warning'>You cannot use your teleporter on this Z-level.</span>"
 		return 0
 
-	for(var/atom/A in T)
+	if(T.contains_dense_objects())
-		if(A.density && !(A.flags & ON_BORDER))
+		H << "<span class='warning'>You cannot teleport to a location with solid objects.</span>"
-			H << "<span class='warning'>You cannot teleport to a location with solid objects.</span>"
-			return 0
 
 	phase_out(H,get_turf(H))
 	H.loc = T

code/modules/spells/spell_code.dm

@@ -189,7 +189,11 @@ var/list/spells = typesof(/spell) //needed for the badmin verb for now
 	if(silenced > 0)
 		return
 
-	if(user.z == 2 && spell_flags & Z2NOCAST) //Certain spells are not allowed on the centcomm zlevel
+	var/turf/Turf = get_turf(user)
+	if(!Turf)
+		user << "<span class='warning'>You cannot cast spells in null space!</span>"
+
+	if(spell_flags & Z2NOCAST && (Turf.z in config.admin_levels)) //Certain spells are not allowed on the centcomm zlevel
 		return 0
 
 	if(spell_flags & CONSTRUCT_CHECK)

code/modules/spells/targeted/ethereal_jaunt.dm

@@ -36,7 +36,7 @@
 			target.monkeyizing=0 //mob is safely inside holder now, no need for protection.
 			jaunt_steam(mobloc)
 			sleep(duration)
-			mobloc = get_turf(target.loc)
+			mobloc = holder.last_valid_turf
 			animation.loc = mobloc
 			jaunt_steam(mobloc)
 			target.canmove = 0
@@ -75,6 +75,11 @@
 	var/reappearing = 0
 	density = 0
 	anchored = 1
+	var/turf/last_valid_turf
+
+/obj/effect/dummy/spell_jaunt/New(var/location)
+	..()
+	last_valid_turf = get_turf(location)
 
 /obj/effect/dummy/spell_jaunt/Destroy()
 	// Eject contents if deleted somehow
@@ -87,6 +92,9 @@
 	var/turf/newLoc = get_step(src,direction)
 	if(!(newLoc.flags & NOJAUNT))
 		loc = newLoc
+		var/turf/T = get_turf(loc)
+		if(!T.contains_dense_objects())
+			last_valid_turf = T
 	else
 		user << "<span class='warning'>Some strange aura is blocking the way!</span>"
 	src.canmove = 0