From d038d9069e9a5b92055c2701f6276b25d69b1502 Mon Sep 17 00:00:00 2001
From: "Brandon R. Stoner" <monokrome@monokro.me>
Date: Thu, 23 Jan 2014 17:27:48 -0800
Subject: [PATCH] Fix unletting non-existant b:current_syntax.

Fixed an issue where `unlet b:current_syntax` occurs when recovering from a Session and b:current_syntax has not been set yet.
---
 syntax/mkd.vim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/syntax/mkd.vim b/syntax/mkd.vim
index c4ceec4..afc7824 100644
--- a/syntax/mkd.vim
+++ b/syntax/mkd.vim
@@ -15,7 +15,10 @@ if version < 600
   so <sfile>:p:h/html.vim
 else
   runtime! syntax/html.vim
-  unlet b:current_syntax
+
+  if exists('b:current_syntax')
+    unlet b:current_syntax
+  endif
 endif
 
 if version < 600
-- 
2.39.5