Making inline work on preview

I have experimented some to get inline work on preview. I found that function _inline_fileobj() returns an object on view put an array on preview. I don't know enough about the inner working of core to know if this is a bug or how it should work.

By adding the line "$file = (object)$file;" to make sure $file is an object inline now works on preview on my site.

Line 226+ inline.module:

$file = _inline_fileobj($node, $value);
// Convert $file to an object, if necessary.
// This makes inline work on preview
$file = (object)$file;