vim-patch:7.4.486

Problem:    Check for writing to a yank register is wrong.
Solution:   Negate the check. (Zyx).  Also clean up the #ifdefs.

https://code.google.com/p/vim/source/detail?r=v7-4-486

src/nvim/version.c

@@ -252,7 +252,7 @@ static int included_patches[] = {
   489,
   488,
   //487,
-  //486,
+  486,
   485,
   //484 NA
   483,