Yarssr does not write feed states if the feed data is invalid

[Johannes]

if some feed does not provide valid data (i.e. no title of an entry) yarssr failed to write the state of the feed. and could not be closed by the menu entry.

Example (taken from http://sagemath.blogspot.com/feeds/posts/default?alt=rss):
<item><guid isPermaLink='false'>tag:blogger.com,1999:blog-6365588202025292315.post-5424821151152248764</guid><pubDate>Thu, 13 Nov 2008 01:53:00 +0000</pubDate><atom:updated>2008-11-12T18:00:03.288-08:00</atom:updated><title>
</title><description>some text</description><link>http://sagemath.blogspot.com/2008/11/im-back-from-sage-days-11-ut-austin.html</link><author><email address hidden> (William Stein)</author></item>

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: yarssr 0.2.2-6 [modified: usr/share/yarssr/Yarssr/Config.pm]
ProcVersionSignature: Ubuntu 2.6.32-38.83-generic 2.6.32.52+drm33.21
Uname: Linux 3.2.0-rc7 i686
Architecture: i386
Date: Mon Jan 30 19:13:10 2012
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de_DE:en
 PATH=(custom, user)
 LANG=de_DE@euro
 LC_MESSAGES=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: yarssr