From 9e5beefd7218c53d6f70531904ad869dbc0b2519 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Sun, 28 Sep 2014 06:37:10 +0000
Subject: [PATCH] Don't display an empty comment author IP link on Comments
 screen.

props afercia.
fixes #29766.

git-svn-id: https://develop.svn.wordpress.org/trunk@29774 602fd350-edb4-49c9-b593-d223f7449a82
---
 .../includes/class-wp-comments-list-table.php   | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 5803b1dca0..e68f0b02d3 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -525,14 +525,15 @@ class WP_Comments_List_Table extends WP_List_Table {
 				comment_author_email_link();
 				echo '<br />';
 			}
-			echo '<a href="edit-comments.php?s=';
-			comment_author_IP();
-			echo '&amp;mode=detail';
-			if ( 'spam' == $comment_status )
-				echo '&amp;comment_status=spam';
-			echo '">';
-			comment_author_IP();
-			echo '</a>';
+
+			$author_ip = get_comment_author_IP();
+			if ( $author_ip ) {
+				$author_ip_url = add_query_arg( array( 's' => $author_ip, 'mode' => 'detail' ), 'edit-comments.php' );
+				if ( 'spam' == $comment_status ) {
+					$author_ip_url = add_query_arg( 'comment_status', 'spam', $author_ip_url );
+				}
+				printf( '<a href="%s">%s</a>', esc_url( $author_ip_url ), $author_ip );
+			}
 		}
 	}