Makes dynamic no longer show none in the vote.

code/controllers/configuration/configuration.dm

@@ -391,6 +391,8 @@ Example config:
 	for(var/T in storyteller_cache)
 		var/datum/dynamic_storyteller/S = T
 		var/config_tag = initial(S.config_tag)
+		if(!config_tag)
+			continue
 		var/probability = (config_tag in probabilities) ? probabilities[config_tag] : initial(S.weight)
 		var/min_players = (config_tag in min_player_counts) ? min_player_counts[config_tag] : initial(S.min_players)
 		if(probability <= 0)