Can haz recursion? get_current_theme() is deprecated in favor of...

Can haz recursion? get_current_theme() is deprecated in favor of wp_get_theme(), not itself. props duck_. see #20138.

git-svn-id: https://core.svn.wordpress.org/trunk@20042 1a063a9b-81f0-0310-95a4-ce76da25c4cd