ChangeSet@2007-05-10 12:59:39+03:00, monty@mysql.com 
  WL#3817: Simplify string / memory area types and make things more consistent
  (first part)
  
  The following type conversions was done:
  
  - Changed byte to uchar
  - Changed gptr to uchar*
  - Change my_string to char *
  - Change my_size_t to size_t
  - Change size_s to size_t
  
  Removed declaration of byte, gptr, my_string, my_size_t and size_s. 
[...]
ha_innodb.cc:
  Removed some old types
  Updated hash-get-key function arguments
  Added missing casts for alloc() and printf()
  Removed some not needed casts

ha_innodb.h:
  Removed some old types