Fix enqueuing of periodic call when jquery-cookie plugin is already included on the page and cookie option is unspecified.

[Umofomia]

This is a pretty simple fix for an issue that happens in the following case:

• The JQuery-Cookie plugin is already included on the page (and thus $.cookie exists).
• $.PeriodicalUpdater() is called with no cookie option set.

When these two occurred, the call would not be enqueued for periodic updating.

The cause for the bug was due to the first line here:

} else if($.cookie && $.cookie(settings.cookie.name)) {
    // Do nothing (already handled above)
} else {
    pu_log("Enqueing a the call for after " + timerInterval, 1);
    reset_timer(timerInterval);
}

Because $.cookie exists, it will attempt to call $.cookie(settings.cookie.name), but because settings.cookie was not specified, it calls $.cookie() with an undefined value, which ends up returning all cookies. As a result it ends up going into the // Do nothing block instead of enqueuing the call.

This fix changes the if statement to also check that settings.cookie was specified first:

} else if(settings.cookie && $.cookie && $.cookie(settings.cookie.name)) {