Followup to cleanup in handler interface.

sql/ha_myisam.h

@@ -63,7 +63,7 @@ class ha_myisam: public handler
   }
   uint max_supported_keys()          const { return MI_MAX_KEY; }
   uint max_supported_key_length()    const { return MI_MAX_KEY_LENGTH; }
-  uint max_supported_key_part_length() { return MI_MAX_KEY_LENGTH; }
+  uint max_supported_key_part_length() const { return MI_MAX_KEY_LENGTH; }
   uint checksum() const;
 
   int open(const char *name, int mode, uint test_if_locked);

sql/ha_myisammrg.h

@@ -46,7 +46,7 @@ class ha_myisammrg: public handler
   }
   uint max_supported_keys()          const { return MI_MAX_KEY; }
   uint max_supported_key_length()    const { return MI_MAX_KEY_LENGTH; }
-  uint max_supported_key_part_length() { return MI_MAX_KEY_LENGTH; }
+  uint max_supported_key_part_length() const { return MI_MAX_KEY_LENGTH; }
   double scan_time()
     { return ulonglong2double(data_file_length) / IO_SIZE + file->tables; }
 

sql/handler.h

@@ -256,7 +256,6 @@ class handler :public Sql_alloc
   time_t create_time;			/* When table was created */
   time_t check_time;
   time_t update_time;
-  enum {NONE=0, INDEX, RND} inited;
 
   /* The following are for read_range() */
   key_range save_end_range, *end_range;
@@ -273,6 +272,7 @@ class handler :public Sql_alloc
   uint raid_type,raid_chunks;
   FT_INFO *ft_handler;
   bool  auto_increment_column_changed;
+  enum {NONE=0, INDEX, RND} inited;
   bool implicit_emptied;                /* Can be !=0 only if HEAP */
 
 
@@ -472,7 +472,7 @@ class handler :public Sql_alloc
   virtual uint max_supported_keys() const { return 0; }
   virtual uint max_supported_key_parts() const { return MAX_REF_PARTS; }
   virtual uint max_supported_key_length() const { return MAX_KEY_LENGTH; }
-  virtual uint max_supported_key_part_length() { return 255; }
+  virtual uint max_supported_key_part_length() const { return 255; }
   virtual uint min_record_length(uint options) const { return 1; }
 
   virtual bool low_byte_first() const { return 1; }