BP_Core_User fatal error when xprofile is disabled

[boonebgorges]

In BP_Core_User::populate(), we attempt to populate some basic user data. Part of this includes checking bp_xprofile_fullname_field_name() so that we can fetch the user's full name, as stored in xprofile.

However, when xprofile is disabled, not only is this check unnecessary (as we don't need the value of $full_name_field_name to populate the data), but a fatal error results, because bp_xprofile_fullname_field_name() does not exist.

[boonebgorges]

Fixed in r5102