Update bp-xprofile-custom-fields-type.php

Bug in setting up add_filter.

It requires a priority parameter first before the accepted_args so it only send the hidden fields.  The other 2 fields $display_user_id and $current_user_id is set to 0 and the function returns erratic or no results because of that.
Version 1.5.7.9
Fixing a bug by moggedb.
Merge branch 'master' of https://github.com/donmik/buddypress-xprofile-custom-fields-type