Do [8221] in a slightly more clean way.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8222 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/syndication/feeds.py

@@ -129,6 +129,7 @@ class Feed(object):
                 author_email = author_link = None
 
             pubdate = self.__get_dynamic_attr('item_pubdate', item)
+            if pubdate:
                 now = datetime.now()
                 utcnow = datetime.utcnow()
 
@@ -141,7 +142,6 @@ class Feed(object):
                     tzDifference = (now - utcnow)
 
                 # Round the timezone offset to the nearest half hour.
-            if pubdate:
                 tzOffsetMinutes = sign * ((tzDifference.seconds / 60 + 15) / 30) * 30
                 tzOffset = timedelta(minutes=tzOffsetMinutes)
                 pubdate = pubdate.replace(tzinfo=FixedOffset(tzOffset))