Skipping inner <object> tags with Firefox to avoid SwfObj conflict. (to ...

...avoid wrapping with `<div>` nested `<object>` tags like `<object>...<object>...</object>...</object>`. This was already released in my http://themes.svn.wordpress.org/responsive/1.6.1/js-dev/jquery.fitvids.js Theme. Patch was proposed and sent to me by Oriol Arcas.