Additional FOR_ALL_WINDOWS usage

src/nvim/spell.c

@@ -4155,8 +4155,6 @@ void spell_free_all(void)
 // Used after 'encoding' is set and when ":mkspell" was used.
 void spell_reload(void)
 {
-  win_T       *wp;
-
   // Initialize the table for spell_iswordp().
   init_spell_chartab();
 
@@ -4164,7 +4162,7 @@ void spell_reload(void)
   spell_free_all();
 
   // Go through all buffers and handle 'spelllang'.
-  for (wp = firstwin; wp != NULL; wp = wp->w_next) {
+  FOR_ALL_WINDOWS(wp) {
     // Only load the wordlists when 'spelllang' is set and there is a
     // window for this buffer in which 'spell' is set.
     if (*wp->w_s->b_p_spl != NUL) {