Prevent "Undefined index: settings-updated" notice in settings_errors…

…(). Props garyc40. Fixes #19377.

git-svn-id: http://svn.automattic.com/wordpress/trunk@19733 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/template.php

@@ -1252,11 +1252,13 @@ function get_settings_errors( $setting = '', $sanitize = false ) {
  */
 function settings_errors( $setting = '', $sanitize = false, $hide_on_update = false ) {
 
-	if ($hide_on_update AND $_GET['settings-updated']) return;
+	if ( $hide_on_update && ! empty( $_GET['settings-updated'] ) )
+		return;
 
 	$settings_errors = get_settings_errors( $setting, $sanitize );
 
-	if ( !is_array($settings_errors) ) return;
+	if ( ! is_array( $settings_errors ) )
+		return;
 
 	$output = '';
 	foreach ( $settings_errors as $key => $details ) {
@@ -1829,4 +1831,4 @@ function convert_to_screen( $hook_name ) {
 	}
 
 	return WP_Screen::get( $hook_name );
-}
+}