[MIRROR] Topic will no longer be called on deleted objects (#6100)

* Merge pull request #36666 from tgstation/Cyberboss-patch-3

Topic will no longer be called on deleted objects

* Topic will no longer be called on deleted objects

code/modules/client/client_procs.dm

@@ -116,6 +116,10 @@ GLOBAL_LIST_INIT(blacklisted_builds, list(
 		if("openLink")
 			src << link(href_list["link"])
 
+	var/datum/real_src = hsrc
+	if(QDELETED(real_src))
+		return
+
 	..()	//redirect to hsrc.Topic()
 
 /client/proc/is_content_unlocked()