Return to apply_filters_ref_array() for back compat with callbacks that...

Return to apply_filters_ref_array() for back compat with callbacks that specify a ref for the args. Props scribu. see #18536

git-svn-id: https://core.svn.wordpress.org/trunk@20024 1a063a9b-81f0-0310-95a4-ce76da25c4cd