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/font.c b/src/font.c
index c08c211199c..ae933df75c8 100644
--- a/src/font.c
+++ b/src/font.c
@@ -3732,8 +3732,8 @@ font_get_frame_data (FRAME_PTR f, struct font_driver *driver)
 void
 font_filter_properties (Lisp_Object font,
                         Lisp_Object alist,
-                        const char *boolean_properties[],
-                        const char *non_boolean_properties[])
+                        const char *const boolean_properties[],
+                        const char *const non_boolean_properties[])
 {
   Lisp_Object it;
   int i;