Index: wp-includes/class-wp-xmlrpc-server.php
===================================================================
--- wp-includes/class-wp-xmlrpc-server.php	(revision 21103)
+++ wp-includes/class-wp-xmlrpc-server.php	(working copy)
@@ -4374,6 +4374,7 @@
 		if ( !$posts_list )
 			return array();
 
+		$struct = array();
 		foreach ($posts_list as $entry) {
 			if ( !current_user_can( 'edit_post', $entry['ID'] ) )
 				continue;