Fix issue2550606 (german translation bug) "an hour" is only used in the context "in an hour" or "an hour ago" which translates to german "in einer Stunde" or "vor einer Stunde". So "an hour" is translated "einer Stunde" (which sounds wrong at first). Also note that date.py already has a comment saying "XXX this is internationally broken" -- but at least there's a workaround for german :-) Thanks to Chris (radioking) for reporting.

--- a/locale/de.po	Tue Dec 15 15:11:27 2009 +0000
+++ b/locale/de.po	Fri Dec 18 11:00:34 2009 +0000
@@ -1788,7 +1788,7 @@
 
 #: ../roundup/date.py:861
 msgid "an hour"
-msgstr "eine Stunde"
+msgstr "einer Stunde"
 
 #: ../roundup/date.py:863
 msgid "1 1/2 hours"