[vim] fix cursor restoration w/vim-vinegar
change
commit a51fdb60ffbc0aae49d21069426ee722e50ca925
author Alpha Chen <alpha.chen@gmail.com>
date
parent 37eb2bdc 
diff --git a/.vimrc b/.vimrc
index 959b8b87..1b50b4d3 100644
--- a/.vimrc
+++ b/.vimrc
@@ -88,7 +88,8 @@ set virtualedit=block
 set noshowmode
 
 function! RestoreCursor()
-  if line("'\"") <= line("$")
+  let pos = line("'\"")
+  if pos > 0 && pos <= line("$")
     normal! g`"zz
     return 1
   endif