vim-patch:7.4.288 #751

Problem:    When 'spellfile' is set the screen is not redrawn.
Solution:   Redraw when updating the spelling info. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=7965cb6a435ae1ea331c7c2f8740d3d4c3625f3b

src/nvim/spell.c

@@ -3967,6 +3967,7 @@ char_u *did_set_spelllang(win_T *wp)
 theend:
   free(spl_copy);
   recursive = FALSE;
+  redraw_win_later(wp, NOT_VALID);
   return ret_msg;
 }