Use get_current_user() and get_current_user_id() instead of global . Props...

Use get_current_user() and get_current_user_id() instead of global . Props filofo. see #13934 for trunk

git-svn-id: https://core.svn.wordpress.org/trunk@15315 1a063a9b-81f0-0310-95a4-ce76da25c4cd