From a88996b170a4538924db3dbb8fa39e049e02aeb0 Mon Sep 17 00:00:00 2001
From: Bailey Ling <bling@live.ca>
Date: Fri, 13 Sep 2013 00:43:02 -0400
Subject: [PATCH] account for possible undefined variable.

---
 autoload/airline/extensions.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/airline/extensions.vim b/autoload/airline/extensions.vim
index 65fbda93..5c202ccf 100755
--- a/autoload/airline/extensions.vim
+++ b/autoload/airline/extensions.vim
@@ -65,7 +65,7 @@ function! airline#extensions#apply(...)
 
   if &buftype == 'quickfix'
     let w:airline_section_a = '%q'
-    let w:airline_section_b = '%{w:quickfix_title}'
+    let w:airline_section_b = '%{get(w:, "quickfix_title", "")}'
     let w:airline_section_c = ''
     let w:airline_section_x = ''
   elseif &buftype == 'help'