Fix comma placement in [25179].

props gradyetc.
see #15004, fixes #25298.

Built from https://develop.svn.wordpress.org/trunk@25413


git-svn-id: http://core.svn.wordpress.org/trunk@25339 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/schema.php

@@ -285,9 +285,9 @@ CREATE TABLE $wpdb->signups (
   meta longtext,
   PRIMARY KEY  (signup_id),
   KEY activation_key (activation_key),
-  KEY user_email (user_email)
+  KEY user_email (user_email),
   KEY user_login_email (user_login,user_email),
-  KEY domain_path (domain,path),
+  KEY domain_path (domain,path)
 ) $charset_collate;";
 
 	switch ( $scope ) {