written bytes.
(grub_get_num_of_utf8_bytes): New function.
(grub_ucs4_to_utf8_alloc): Use grub_get_num_of_utf8_bytes.
* grub-core/normal/menu_entry.c (run): Convert entry to UTF-8 before
executing it.
* include/grub/charset.h (grub_get_num_of_utf8_bytes): New proto.
(grub_ucs4_to_utf8): Change return type.