vim-patch:7.4.281 #746

Problem:    When a session file has more than one tabpage and 'showtabline' is
            one the positions may be slightly off.
Solution:   Set 'showtabline' to two while positioning windows.

https://code.google.com/p/vim/source/detail?r=24c90f1fec859b54cf2b854b98c4c9e614c46061

src/nvim/version.c

@@ -206,7 +206,7 @@ static int included_patches[] = {
   //284,
   //283,
   //282,
-  //281,
+  281,
   280,
   //279,
   //278,