When updating a user, only send email-change notification if email address is passed.

The notification, introduced in [32380], was firing incorrectly (and throwing
a PHP notice) when `wp_update_user()` was called without including 'user_email'
in the update data.

Props imath.
Fixes #32684. See #32430.
Built from https://develop.svn.wordpress.org/trunk@32838


git-svn-id: http://core.svn.wordpress.org/trunk@32809 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -2158,7 +2158,7 @@ function wp_update_user($userdata) {
 		$send_pass_change_email = apply_filters( 'send_pass_change_email', true, $user, $userdata );
 	}
 
-	if ( $user['user_email'] !== $userdata['user_email'] ) {
+	if ( isset( $userdata['user_email'] ) && $user['user_email'] !== $userdata['user_email'] ) {
 		/**
 		 * Filter to stop the sending of the email change email.
 		 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32837';
+$wp_version = '4.3-alpha-32838';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.