mysqltest: replace_result now also affects error messages


client/mysqltest.c:
  replace_result now also affects error messages
include/ft_global.h:
  Make variables ulong to not break mysqld.cc init of variables.
myisam/ft_static.c:
  Make variables ulong to not break mysqld.cc init of variables.
mysql-test/r/join.result:
  Fix for 64 bit systems
mysql-test/t/join.test:
  Fix for 64 bit systems