Merge pull request #15773 from AnturK/template_fix

Fixes uploaded templates size preview

code/modules/admin/verbs/map_template_loadverb.dm

@@ -4,14 +4,15 @@
 
 	var/datum/map_template/template
 
-	var/turf/T = get_turf(mob)
-	if(!T)
-		return
 	var/map = input(usr, "Choose a Map Template to place at your CURRENT LOCATION","Place Map Template") as null|anything in map_templates
 	if(!map)
 		return
 	template = map_templates[map]
 
+	var/turf/T = get_turf(mob)
+	if(!T)
+		return
+
 	var/list/preview = list()
 	for(var/S in template.get_affected_turfs(T,centered = TRUE))
 		preview += image('icons/turf/overlays.dmi',S,"greenOverlay")
@@ -33,5 +34,6 @@
 		return
 
 	var/datum/map_template/M = new(map=map, rename="[map]")
+	M.preload_size(map)
 	map_templates[M.name] = M
 	message_admins("<span class='adminnotice'>[key_name_admin(usr)] has uploaded a map template ([map])</span>")