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/ex_cmds.c

@@ -4779,6 +4779,7 @@ void ex_helptags(exarg_T *eap)
       WILD_LIST_NOTFOUND|WILD_SILENT, WILD_EXPAND_FREE);
   if (dirname == NULL || !os_isdir(dirname)) {
     EMSG2(_("E150: Not a directory: %s"), eap->arg);
+    xfree(dirname);
     return;
   }