Don't double number-format directory pagination counts

By running total item counts through number_format_i18n() twice, certain
number formats were getting messed up.

Fixes #5228

Props sgr33n

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7513 cdf35c40-ae34-48e0-9cc9-0c9da1808c22