Mainly cleanups for gcc 4.0. Some small pieces from looking at -Wall. Removed a number of dumb things in ha_tina.


client/mysqladmin.cc:
  gcc 4.0 fix
sql/examples/ha_archive.cc:
  Bunch of little cleanups from -Wall and gcc 4.0 fixes
sql/examples/ha_example.cc:
  Noticed that the error call was not quite right.
sql/examples/ha_tina.cc:
  Bunch of cleanups (many of which were quite dumb of me... and I have no earthly idea how they missed everyone's notice).
sql/ha_heap.cc:
  Removed unused variable (-Wall find)
sql/item_subselect.cc:
  Removed unused label.
sql/mysqld.cc:
  Cleanup of unused function and gcc 4.0 bit.
sql/opt_range.h:
  Cleanup for gcc 4.0
sql/repl_failsafe.cc:
  Cleanup for gcc 4.0
sql/slave.cc:
  Cleanup for gcc 4.0
sql/sql_acl.cc:
  Cleanup for gcc 4.0
sql/sql_insert.cc:
  Cleanedup for gcc 4.0
sql/sql_parse.cc:
  Cleanedup for gcc 4.0
sql/sql_repl.cc:
  Removed unused variable
sql/sql_select.cc:
  Cleanedup for gcc 4.0