From 30e5dff895aab1b7ee3da02136f57a3a42cda7aa Mon Sep 17 00:00:00 2001
From: Kevin MacMartin <prurigro@gmail.com>
Date: Thu, 31 Jul 2014 01:05:43 -0400
Subject: [PATCH] Use mapcheck before unmapping

---
 vim/config/vimpager.vim | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/vim/config/vimpager.vim b/vim/config/vimpager.vim
index 919d533..0419ab6 100644
--- a/vim/config/vimpager.vim
+++ b/vim/config/vimpager.vim
@@ -12,10 +12,10 @@
 " Undo unwanted less.vim keymappings
 unmap v
 unmap w
-unmap <PageDown>
-unmap <kPageDown>
-unmap <PageUp>
-unmap <kPageUp>
+if mapcheck('<PageDown>', 'b')|unmap <PageDown>|endif
+if mapcheck('<PageDown>', 'b')|unmap <kPageDown>|endif
+if mapcheck('<PageDown>', 'b')|unmap <PageUp>|endif
+if mapcheck('<PageDown>', 'b')|unmap <kPageUp>|endif
 
 " Main Settings:
 set nocursorline nocursorcolumn "disable cursor column/line highlighting