Added missing copyright
Indentation and prototype fixes
Fixed compiler warning


include/my_sys.h:
  Fix prototype for my_print_open_files.
  Indentation fixes
mysys/mf_keycache.c:
  Fix that key cache can be compiled without #define THREAD
mysys/my_error.c:
  Indentation cleanups
mysys/my_memmem.c:
  Added missing copyright.
  Fix include files
sql/event.cc:
  unsigned char -> uchar
sql/field.cc:
  unsigned char -> uchar
sql/filesort.cc:
  Indentation fix
sql/ha_ndbcluster.cc:
  unsigned char -> uchar
sql/ha_ndbcluster_binlog.cc:
  unsigned char -> uchar
sql/item_strfunc.cc:
  unsigned char -> uchar
sql/log_event.cc:
  unsigned char -> uchar
sql/opt_range.cc:
  Indentation fixes
sql/sql_crypt.cc:
  unsigned char -> uchar
sql/sql_string.cc:
  unsigned char -> uchar
sql/tztime.cc:
  unsigned char -> uchar
storage/heap/hp_extra.c:
  Clear also next_block (See heap_scan_init)
storage/heap/hp_test2.c:
  Set required struct memeber max_table_size
  (Fixes that hp_test2 works again)
storage/myisam/mi_rsamepos.c:
  Fixed bug in mi_rsame_with_pos
strings/decimal.c:
  Fixed compiler warning