From 15f6cabf838cc4059837db6e450fb9c93d094d3b Mon Sep 17 00:00:00 2001
From: Tom Burns <tom.burns@jadedpixel.com>
Date: Wed, 30 Jul 2014 15:12:22 +0000
Subject: [PATCH] avoid a hash comparison

---
 lib/liquid/context.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/liquid/context.rb b/lib/liquid/context.rb
index 6e8ceb81..a075b261 100644
--- a/lib/liquid/context.rb
+++ b/lib/liquid/context.rb
@@ -135,9 +135,9 @@ module Liquid
     #   end
     #
     #   context['var]  #=> nil
-    def stack(new_scope={})
+    def stack(new_scope=nil)
       old_stack_used = @this_stack_used
-      @this_stack_used = (new_scope != {})
+      @this_stack_used = (new_scope != nil)
       push(new_scope) if @this_stack_used
       yield
     ensure