vim-patch:7.4.550 #2510

Problem:    curs_rows() function is always called with the second argument
            false.
Solution:   Remove the argument. (Christian Brabandt)
            validate_botline_win() can then also be removed.

https://github.com/vim/vim/releases/tag/v7-4-550

src/nvim/version.c

@@ -219,7 +219,7 @@ static int included_patches[] = {
   //553,
   552,
   551,
-  //550,
+  550,
   549,
   //548 NA
   547,