sql/opt_range.cc:
  Fix for unreferenced local variable, cast and indirection to different types
sql/sp_head.cc:
  Fix for unreferenced variables and cast
sql/sql_acl.cc:
  Fix for unreferenced variable
sql/sql_db.cc:
  Fix for unreferenced variable and cast
sql/sql_insert.cc:
  Fix for cast and redifinition of variable declared  i (VC++ bug)
sql/sql_parse.cc:
  Fix for cast
sql/sql_update.cc:
  Fix for cast