Add const to array elements of font filter properties.

* font.c (font_filter_properties): Add const to array elements of properties args.
* font.h (font_filter_properties): Likewise.
* ftfont.c (ftfont_booleans, ftfont_non_booleans): Add const to array elements.
* w32font.c (w32font_booleans, w32font_non_booleans): Likewise.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/ftfont.c b/src/ftfont.c
index b0d10791379..d9ae9be0905 100644
--- a/src/ftfont.c
+++ b/src/ftfont.c
@@ -2598,7 +2598,7 @@ ftfont_font_format (FcPattern *pattern, Lisp_Object filename)
   return intern ("unknown");
 }
 
-static const char *ftfont_booleans [] = {
+static const char *const ftfont_booleans [] = {
   ":antialias",
   ":hinting",
   ":verticallayout",
@@ -2611,7 +2611,7 @@ static const char *ftfont_booleans [] = {
   NULL,
 };
 
-static const char *ftfont_non_booleans [] = {
+static const char *const ftfont_non_booleans [] = {
   ":family",
   ":familylang",
   ":style",