neovim/neovim — pull request #832 by epmatsw (2014-06-13 01:41:47+00:00)
Title: vim-patch:7.4.308

Problem: When using ":diffsplit" on an empty file the cursor is displayed
on the command line.
Solution: Limit the value of w_topfill.

https://code.google.com/p/vim/source/detail?r=e3d2b8d83bb30c428a051f50791e454fcbc080af