MySQL full text search always uses MyISAM limits

The MySQL full text search always uses the MyISAM engine limits for the min and max search strings, even when using the InnoDB engine.

fulltext_mysql.php looks up the ft_max_word_len and ft_min_word_len settings when determining what the maximum and minimum search strings are. However, these are only valid for the MyISAM engine. For the InnoDB engine the settings are innodb_ft_max_token_size and innodb_ft_min_token_size.