vim-patch:7.4.578

Problem:    Using getcurpos() after "$" in an empty line returns a negative
            number.
Solution:   Don't add one when this would overflow. (Hirohito Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-578

src/nvim/version.c

@@ -206,7 +206,7 @@ static int included_patches[] = {
   //581,
   //580,
   //579,
-  //578,
+  578,
   //577,
   //576,
   //575,