Index: wp-includes/theme.php
===================================================================
--- wp-includes/theme.php	(revision 19820)
+++ wp-includes/theme.php	(working copy)
@@ -1490,7 +1490,7 @@
 		}
 
 		if ( empty( $headers ) )
-			return stdClass();
+			return stdClass;
 
 		$_wp_random_header = (object) $headers[ array_rand( $headers ) ];