wrong url for get_avatar

[lite3]

description

1. one user registered at website.
2. write a comment.
3. remove the user.
4. the user's avatar is wrong.

solve it

if not had user for $comment->user_id, use $comment->comment_author_email

[lite3]

Replying to mauryaratan:
not here. in function get_avatar of wp-includes/pluggable.php.

===old code:===

// No avatar for pingbacks or trackbacks
$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) )
        return false;

if ( !empty($id_or_email->user_id) ) {
        $id = (int) $id_or_email->user_id;
        $user = get_userdata($id);
        if ( $user)
                $email = $user->user_email;
} elseif ( !empty($id_or_email->comment_author_email) ) {
        $email = $id_or_email->comment_author_email;
}

===new code:===

// No avatar for pingbacks or trackbacks
$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) )
        return false;

if ( !empty($id_or_email->user_id) ) {
        $id = (int) $id_or_email->user_id;
        $user = get_userdata($id);
        if ( $user)
                $email = $user->user_email;
}
if ( $email === '' && !empty($id_or_email->comment_author_email) ) {
        $email = $id_or_email->comment_author_email;
}

[mauryaratan]

check if $email is blank

[mauryaratan]

You’re right there wasn't any need to pass the email specifically instead check for the email it it's blank. Edited the patch :)

[SergeyBiryukov]

In 26000:

Fall back to comment author email in get_avatar() if the user who left the comment no longer exists.

props mauryaratan, lite3.
fixes #25803.