Improve status checks when sending comment post author notification.

[34537] hooked `wp_new_comment_notify_postauthor()` to the
'wp_set_comment_status' when a comment had been approved. When performing
multiple actions on a comment in the same request (as happens in
`Tests_Ajax_DeleteComment::test_ajax_trash_double_action()`, and may happen
sometimes in real life too), and when one of those actions involves deleting
the comment, the `$comment_ID` passed to `wp_new_comment_notify_postauthor()`
can correspond to an already-deleted comment. The `comment_status` check should
account for this possibility.

See #14078.
Built from https://develop.svn.wordpress.org/trunk@34545


git-svn-id: http://core.svn.wordpress.org/trunk@34509 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment-functions.php

@@ -1737,7 +1737,7 @@ function wp_new_comment_notify_postauthor( $comment_ID ) {
 	}
 
 	// Only send notifications for approved comments.
-	if ( 'spam' === $comment->comment_approved || ! $comment->comment_approved ) {
+	if ( ! isset( $comment->comment_approved ) || 'spam' === $comment->comment_approved || ! $comment->comment_approved ) {
 		return false;
 	}
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34544';
+$wp_version = '4.4-alpha-34545';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.