fix type in call issue

lib/virtual/slots/frame_slot.rb

@@ -8,6 +8,11 @@ module Virtual
       super(type, value)
       @index = index
     end
+    attr_reader :index
+
+    def to_s
+      "#{self.class.name}.new(#{index} , #{type}, #{value})"
+    end
 
     def object_name
       return :frame

lib/virtual/slots/message_slot.rb

@@ -45,6 +45,9 @@ module Virtual
       super( type , value )
     end
     attr_reader :index
+    def to_s
+      "#{self.class.name}.new(#{index} , #{type}, #{value})"
+    end
   end