Fixing deprecated errors

Here’s a diff you can apply to remove calls to deprecated functions.

@mvandemar are you able to make these changes to the plugin?

diff a/login-lockdown/loginlockdown.php b/login-lockdown/loginlockdown.php
--- a/login-lockdown/loginlockdown.php
+++ b/login-lockdown/loginlockdown.php
@@ -165,9 +165,9 @@ function isLockedDown() {
        $ip = $_SERVER['REMOTE_ADDR'];
        $class_c = substr ($ip, 0 , strrpos ( $ip, "." ));

-       $stillLocked = $wpdb->get_var("SELECT user_id FROM $table_name " .
+       $stillLocked = $wpdb->get_var($wpdb->prepare("SELECT user_id FROM $table_name " .
                                        "WHERE release_date > now() AND " .
-                                       "lockdown_IP LIKE '" . $wpdb->escape($class_c) . "%'");
+                                       "lockdown_IP LIKE %s",  $class_c . '%'));

        return $stillLocked;
 }
@@ -333,7 +333,7 @@ if ( isset($loginlockdown_db_version) ) {
                        return $error;
                }

-               $userdata = get_userdatabylogin($username);
+        $userdata = get_user_by('login', $username);

                if ( !$userdata ) {

http://wordpress.org/plugins/login-lockdown/