add dependency checks for card.linked_card_x

data/ch-t.mse-locale/locale

@@ -1141,6 +1141,10 @@ error:
 	# error from files
 	#TODO: Localize
 	no card fields:						Game '%s' does not have any card fields. Define at least one card field.
+	#TODO: Localize
+	reserved field name:				'%s' is a reserved card field name. Use another name.
+	#TODO: Localize
+	duplicate field name:				Duplicate alt card field name '%s' is both an alt for '%s' and '%s'.
 	no game specified:					沒有為 %s 指定游戲類型
 	no stylesheet specified for the set:	沒有為套牌制定樣式表
 	stylesheet and set refer to different game: