Update german translation

locale/de_DE/LC_MESSAGES/messages.po

@@ -12,7 +12,7 @@ msgstr ""
 "Project-Id-Version: Tiny Tiny RSS\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2015-03-11 15:49+0300\n"
-"PO-Revision-Date: 2015-03-11 20:45+0100\n"
+"PO-Revision-Date: 2015-03-11 20:49+0100\n"
 "Last-Translator: Heiko Adams <heiko.adams@gmai.com>\n"
 "Language-Team: \n"
 "Language: de\n"
@@ -49,7 +49,7 @@ msgstr "Nach 2 Monaten"
 
 #: backend.php:79
 msgid "3 months old"
-msgstr "3 months old"
+msgstr "Nach 3 Monaten"
 
 #: backend.php:82
 msgid "Default interval"