Avoid PHP 4 parse error prior to version checks. Props dd32. see #17880

git-svn-id: https://develop.svn.wordpress.org/trunk@18339 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/load.php

@@ -561,7 +561,8 @@ function shutdown_action_hook() {
  */
 
 function wp_clone( $object ) {
-	return clone $object;
+	// Use parens for clone to accommodate PHP 4.  See #17880
+	return clone( $object );
 }
 
 /**