vim-patch:7.4.421

Problem:    Crash when searching for "\ze*". (Urtica Dioica)
Solution:   Disallow a multi after \ze and \zs.

https://code.google.com/p/vim/source/detail?r=v7-4-421

src/nvim/version.c

@@ -244,7 +244,7 @@ static int included_patches[] = {
   //424 NA
   //423,
   //422,
-  //421,
+  421,
   //420 NA
   419,
   418,