From 057b429b022c2670cb1b3738602b65eebcdf490f Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Wed, 27 Apr 2016 20:11:40 +0200
Subject: [PATCH] Check that default value exists, before accessing it

closes #1146
---
 autoload/airline/extensions/default.vim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/autoload/airline/extensions/default.vim b/autoload/airline/extensions/default.vim
index 416c73ea..ec305c5d 100644
--- a/autoload/airline/extensions/default.vim
+++ b/autoload/airline/extensions/default.vim
@@ -22,6 +22,9 @@ function! s:get_section(winnr, key, ...)
     endif
   endif
   let spc = g:airline_symbols.space
+  if !exists('g:airline_section_{a:key}')
+    return ''
+  endif
   let text = airline#util#getwinvar(a:winnr, 'airline_section_'.a:key, g:airline_section_{a:key})
   let [prefix, suffix] = [get(a:000, 0, '%('.spc), get(a:000, 1, spc.'%)')]
   return empty(text) ? '' : prefix.text.suffix