Fix comments

lib/migrate.php

@@ -76,6 +76,7 @@ class OC_Migrate{
 	 * @param ootional $type string type of export, defualts to user
 	 * @param otional $path string path to zip output folder
 	 * @param optional $uid string user id of user to export if export type is user, defaults to current
+	 * @return false on error, path to zip on success 
 	 */
 	 public static function export( $type='user', $path=null, $uid=null ){
 		$datadir = OC_Config::getValue( 'datadirectory' );