char'.
(face_cachel_charset_font_metric_info): Likewise.
 
 void
 ensure_face_cachel_complete (struct face_cachel *cachel,
-                            Lisp_Object domain, unsigned char *charsets)
+                            Lisp_Object domain, Charset_ID *charsets)
 {
   int i;
 
 
 void
 face_cachel_charset_font_metric_info (struct face_cachel *cachel,
-                                     unsigned char *charsets,
+                                     Charset_ID *charsets,
                                      struct font_metric_info *fm)
 {
   int i;