Ensure that get_nav_menu_locations() always returns an array. props JustinSainton for initial patch. fixes #23508.

git-svn-id: http://core.svn.wordpress.org/trunk@23550 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make wp_convert_bytes_to_hr() return consistent results on 32-bit and 64-bit systems. fixes #23626.

git-svn-id: http://core.svn.wordpress.org/trunk@23551 1a063a9b-81f0-0310-95a4-ce76da25c4cd