vim-patch:7.4.2069

Problem:    spell.c is too big.
Solution:   Split it in spell file handling and spell checking.

9ccfebddc3

src/nvim/ex_docmd.c

@@ -50,6 +50,7 @@
 #include "nvim/screen.h"
 #include "nvim/search.h"
 #include "nvim/spell.h"
+#include "nvim/spellfile.h"
 #include "nvim/strings.h"
 #include "nvim/syntax.h"
 #include "nvim/tag.h"