Don't throw an error and don't redirect when there's no extension ID found in _fixBrokenSQLUpdates()
.DS_Store, Thumbs.db and .gitignore files may end up in packages

Also converted spaces, which needs to be tabs, to tabs. Therefor the diff is messed up…

See: https://www.assembla.com/code/akeeba-subscriptions/git/changesets/ca4e97b4ba06e67ca0e1156cf18a305b90e25a4d