vim-patch:7.4.1868

Problem:    Setting really_exiting causes memory leaks to be reported.
Solution:   Add the in_free_all_mem flag.

b89a25f17e

src/nvim/globals.h

@@ -636,6 +636,10 @@ EXTERN int exiting INIT(= FALSE);
 /* TRUE when planning to exit Vim.  Might
  * still keep on running if there is a changed
  * buffer. */
+#if defined(EXITFREE)
+// true when in or after free_all_mem()
+EXTERN bool entered_free_all_mem INIT(= false);
+#endif
 /* volatile because it is used in signal handler deathtrap(). */
 EXTERN volatile int full_screen INIT(= FALSE);
 /* TRUE when doing full-screen output