Index: wp-includes/user.php
===================================================================
--- wp-includes/user.php	(revision 18905)
+++ wp-includes/user.php	(working copy)
@@ -684,10 +684,8 @@
 	if ( false === $blogs ) {
 		$userkeys = get_user_meta( (int) $id );
 		if ( empty( $userkeys ) )
-                        return false;
-		$userkeys = array_keys( $userkeys );
-		if ( empty( $userkeys ) )
 			return false;
+		$userkeys = array_keys( $userkeys );
 
 		$blogs = $match = array();
 		$prefix_length = strlen( $wpdb->base_prefix );