were changed in handler, but not in ha_tina. Added some commments. Fixed the code to fit
into my editor window :)


sql/examples/ha_tina.cc:
  Cleanup: Fix comments and code to fit 80-char lines, remove trailing spaces,
           add spaces after commas in the function calls.
           Also added/clarified several comments
sql/examples/ha_tina.h:
  fix warinings, add some comments about chain usage