Add nonces to importers

git-svn-id: http://svn.automattic.com/wordpress/trunk@5404 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin-functions.php

@@ -2030,6 +2030,7 @@ function wp_import_upload_form( $action ) {
 ?>
 <form enctype="multipart/form-data" id="import-upload-form" method="post" action="<?php echo attribute_escape($action) ?>">
 <p>
+<?php wp_nonce_field('import-upload'); ?>
 <label for="upload"><?php _e( 'Choose a file from your computer:' ); ?></label> (<?php printf( __('Maximum size: %s' ), $size ); ?> )
 <input type="file" id="upload" name="import" size="25" />
 <input type="hidden" name="action" value="save" />