Make 0 the default status for admin-ajax.php. props TobiasBg. fixes #15327.

git-svn-id: https://develop.svn.wordpress.org/trunk@19762 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/admin-ajax.php

@@ -18,7 +18,7 @@ define( 'WP_ADMIN', true );
 
 // Require an action parameter
 if ( empty( $_REQUEST['action'] ) )
-    die( '-1' );
+    die( '0' );
 
 /** Load WordPress Bootstrap */
 require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' );
@@ -63,4 +63,4 @@ else
     do_action( 'wp_ajax_nopriv_' . $_REQUEST['action'], $_REQUEST['action'] ); // Non-admin actions
 
 // Default status
-die( '-1' );
+die( '0' );