og_default_list field formatter double-escapes entities

In og.field.inc, og_field_formatter_view() generates a label for a group from og_label(), which is then passed to theme_link(). The problem with this is og_label_multiple() by default calls filter_xss() on the text, which escapes any entities; theme_link calls check_plain() on the text it's given, which also escapes any entities.

The correction is very simple, as og_label_multiple() does allow for values to not be sanitized. Patch will be attached which corrects the issue.