vim-patch:7.4.528

Problem:    Crash when using matchadd() (Yasuhiro Matsumoto)
Solution:   Copy the match regprog.

https://code.google.com/p/vim/source/detail?r=v7-4-528

src/nvim/version.c

@@ -210,7 +210,7 @@ static int included_patches[] = {
   //531,
   //530,
   //529,
-  //528,
+  528,
   527,
   //526,
   //525,