vim-patch:7.4.922

Problem:    Leaking memory with ":helpt {dir-not-exists}".
Solution:   Free dirname. (Dominique Pelle)

1c2836e268

---

see: "[patch] command :helpt {dir} leaks memory when directory does not exist"
     https://groups.google.com/d/msg/vim_dev/WbcIbZ9YdUA/4eow2c3_AgAJ

src/nvim/version.c

@@ -366,7 +366,7 @@ static int included_patches[] = {
   // 925,
   // 924 NA
   // 923 NA
-  // 922,
+  922,
   // 921 NA
   // 920 NA
   // 919 NA