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/ftxfont.c b/src/ftxfont.c
index 63d03b0e244..8050f292600 100644
--- a/src/ftxfont.c
+++ b/src/ftxfont.c
@@ -260,9 +260,9 @@ ftxfont_open (struct frame *f, Lisp_Object entity, int pixel_size)
 }
 
 static void
-ftxfont_close (struct frame *f, struct font *font)
+ftxfont_close (struct font *font)
 {
-  ftfont_driver.close (f, font);
+  ftfont_driver.close (font);
 }
 
 static int