innobase/include/srv0srv.h:
  Declare srv_auto_extend_increment and srv_max_purge_lag as ulong,
  because ulint and ulong are of different size on Win64.
innobase/srv/srv0srv.c:
  Declare srv_auto_extend_increment and srv_max_purge_lag as ulong,
  because ulint and ulong are of different size on Win64.