extra/perror.c:
  Use strmov() instead of strcpy()
  Indentation fixes
sql/sql_table.cc:
  Revert back part of the old code as the new code didn't use mysql_data_home, which would have caused problems in the embedded server
sql/sql_update.cc:
  Ensure that used_index is always set (It has to be set because it's value is tested if order != 0)