Index: wp-admin/includes/class-wp-list-table.php
===================================================================
--- wp-admin/includes/class-wp-list-table.php	(revision 16973)
+++ wp-admin/includes/class-wp-list-table.php	(working copy)
@@ -845,6 +845,9 @@
 	 * @access private
 	 */
 	function _js_vars() {
+		if ( ! $this->has_items() )
+			return;
+
 		$args = array(
 			'class' => get_class( $this ),
 			'screen' => get_current_screen()
Index: wp-admin/js/list-table.dev.js
===================================================================
--- wp-admin/js/list-table.dev.js	(revision 16973)
+++ wp-admin/js/list-table.dev.js	(working copy)
@@ -144,6 +144,9 @@
 	}
 }
 
+if ( typeof list_args == 'undefined' )
+	return;
+
 listTable.init();
 
 // Ajaxify various UI elements