Unknown property filling error log

When search engines or users open feed page of a tag, error log is filled with

```PHP Notice:  Undefined property: stdClass::$title in /home/joomla3.2/public_html/components/com_tags/views/tag/view.feed.php on line 60```

I guess author wanted to get title of the tag, so I changed the code accordingly
Update view.feed.php
Update view.feed.php
Merge pull request #3498 from chivitli/patch-10

Unknown property filling error log
A revised version by infograf768
Fixed missing return
Merge pull request #3951 from roland-d/joomlaupdate

[#33000] Fixed Purge cache button not working because of a missing form
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