From e117af9dd05a2eea4ac6b489ce0af3dce2f817da Mon Sep 17 00:00:00 2001
From: farseer90718 <farseer90718@gmail.com>
Date: Wed, 11 Sep 2013 10:08:51 +0800
Subject: [PATCH] Disable white space detection for unmodifiable buffers

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

diff --git a/autoload/airline/extensions/whitespace.vim b/autoload/airline/extensions/whitespace.vim
index bcfc6c46..66917ad9 100644
--- a/autoload/airline/extensions/whitespace.vim
+++ b/autoload/airline/extensions/whitespace.vim
@@ -19,7 +19,7 @@ let s:mixed_indent_format = get(g:, 'airline#extensions#whitespace#mixed_indent_
 let s:enabled = 1
 
 function! airline#extensions#whitespace#check()
-  if &readonly || !s:enabled
+  if &readonly || !&modifiable || !s:enabled
     return ''
   endif