[MIRROR] Fixes null-named painting issue (#2683)

* Fixes null-named painting issue (#56113)

There was an issue where you could name paintings nothing, which would cause issues with persistency. This was because the stripped_input didn't actually check that you put something in, so the PR adds that check. It now ensures, both when saved and loaded, that there is a title. If not, it sets them to the default 'Untitled Artwork'

* Fixes null-named painting issue

Co-authored-by: Coffee <CoffeeDragon16@gmail.com>

code/game/objects/structures/artstuff.dm

@@ -323,6 +323,8 @@
 	var/title = chosen["title"]
 	var/author = chosen["ckey"]
 	var/png = "data/paintings/[persistence_id]/[chosen["md5"]].png"
+	if(!title)
+		title = "Untitled Artwork" //Should prevent NULL named art from loading as NULL, if you're still getting the admin log chances are persistence is broken
 	if(!title)
 		message_admins("<span class='notice'>Painting with NO TITLE loaded on a [persistence_id] frame in [get_area(src)]. Please delete it, it is saved in the database with no name and will create bad assets.</span>")
 	if(!fexists(png))
@@ -353,7 +355,7 @@
 		stack_trace("Invalid persistence_id - [persistence_id]")
 		return
 	if(!C.painting_name)
-		return
+		C.painting_name = "Untitled Artwork"
 	var/data = C.get_data_string()
 	var/md5 = md5(lowertext(data))
 	var/list/current = SSpersistence.paintings[persistence_id]