Omit unused frame argument of font API's close function.

* font.h (struct font): Drop frame argument.  Adjust comment.
* font.c (font_clear_cache, font_close_object): Adjust users.
* ftfont.c (ftfont_close):
* ftxfont.c (ftxfont_close):
* macfont.m (macfont_close):
* nsfont.m (nsfont_close):
* w32font.c (w32font_close):
* xfont.c (xfont_close):
* xftfont.c (xftfont_close): Adjust driver-specific close
functions, tweak comments and make functions safe if called
more than once for the same font object.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/font.h b/src/font.h
index 0ec56590916..9285330ce54 100644
--- a/src/font.h
+++ b/src/font.h
@@ -545,8 +545,8 @@ struct font_driver
   Lisp_Object (*open) (struct frame *f, Lisp_Object font_entity,
                        int pixel_size);
 
-  /* Close FONT on frame F.  */
-  void (*close) (struct frame *f, struct font *font);
+  /* Close FONT.  */
+  void (*close) (struct font *font);
 
   /* Optional (if FACE->extra is not used).
      Prepare FACE for displaying characters by FONT on frame F by