vim-patch:7.4.887

Problem:    Using uninitialized memory for regexp with back reference.
            (Dominique Pelle)
Solution:   Initialize end_lnum.

c2b717ebd6

---

see: "[bug] use of uninitialized memory in regexp_nfa.c with invalid back reference"
     https://groups.google.com/d/msg/vim_dev/JWmrT5-NnPQ/U_TgaRW8AwAJ

src/nvim/version.c

@@ -401,7 +401,7 @@ static int included_patches[] = {
   // 890 NA
   // 889,
   // 888,
-  // 887,
+  887,
   // 886 NA
   // 885,
   // 884 NA