Fix regression from [29031], about migrationAssistant being undefined, thanks Eric.  Refs #13101 !strict.
Fix regression from [29031], about migrationAssistant being undefined, thanks Eric.  Refs #13101 !strict.

git-svn-id: ee6e786acc44c9cca5ee17c71a5576c45c210361@29121 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful