From 1965e31075515c6b261a709e08314943b97a9498 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Sun, 25 Oct 2009 13:03:08 +0100
Subject: [PATCH] Shortcut for the if inner visit for empty branches.

--HG--
branch : trunk
---
 jinja2/compiler.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/jinja2/compiler.py b/jinja2/compiler.py
index 2dd68cd..a6f26a5 100644
--- a/jinja2/compiler.py
+++ b/jinja2/compiler.py
@@ -278,6 +278,8 @@ class FrameIdentifierVisitor(NodeVisitor):
                     real_identifiers.declared_parameter
 
         def inner_visit(nodes):
+            if not nodes:
+                return set()
             self.identifiers = real_identifiers.copy()
             for subnode in nodes:
                 self.visit(subnode)
-- 
2.26.2