failing fulltext_order_by.test fixed

sql/handler.h

@@ -367,6 +367,7 @@ public:
   virtual int read_range_next();
   int compare_key(key_range *range);
   virtual int ft_init() { return HA_ERR_WRONG_COMMAND; }
+  void ft_end() { ft_handler=NULL; }
   virtual FT_INFO *ft_init_ext(uint flags,uint inx,const byte *key,
                                uint keylen)
     { return NULL; }