[1.3.x] Fixed our Sphinx extension to work with latest Sphinx

This is pretty hacky, but there doesn't seem to be a nice way to fix it,
since we can't call the base method - we are deliberately overriding it in
order to not call the base method, which adds an unwanted 'border=1' to the
HTML.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16223 bcc190cf-cafb-0310-a4f2-bffc1f526a37

Backport of e127e17b49 from master

docs/_ext/djangodocs.py

@@ -127,6 +127,7 @@ class DjangoHTMLTranslator(SmartyPantsHTMLTranslator):
 
     # Don't use border=1, which docutils does by default.
     def visit_table(self, node):
+        self._table_row_index = 0 # Needed by Sphinx
         self.body.append(self.starttag(node, 'table', CLASS='docutils'))
 
     # <big>? Really?