return Qnil;
file = (char *) str;
- key = Fcons (make_unibyte_string (file, strlen (file)), make_number (idx));
+ key = Fcons (build_unibyte_string (file), make_number (idx));
cache = ftfont_lookup_cache (key, FTFONT_CACHE_FOR_ENTITY);
entity = XCAR (cache);
if (! NILP (entity))