Fixed #10644: removed an undocumented, unused, and (as far as I can tell) unnecessary "feature" of the ifchanged tag. Thanks, akaihola.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10438 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/defaulttags.py

@@ -186,10 +186,7 @@ class IfChangedNode(Node):
         if compare_to != self._last_seen:
             firstloop = (self._last_seen == None)
             self._last_seen = compare_to
-            context.push()
-            context['ifchanged'] = {'firstloop': firstloop}
             content = self.nodelist_true.render(context)
-            context.pop()
             return content
         elif self.nodelist_false:
             return self.nodelist_false.render(context)