Include charset.h.

Include charset.h.
(load_face_font): Argument C deleted.  Caller changed.
(generate_ascii_font_name): Renamed from generate_ascii_font.
(font_name_registry): New function.
(cache_face): Store ascii faces before non-ascii faces in buckets.
(lookup_face): Arguments C and BASE_FACE deleted.  Caller changed.
Lookup only ascii faces.
(lookup_non_ascii_face): New function.
(lookup_named_face): Argument C deleted.  Caller changed.
(lookup_derived_face): Argument C deleted.  Caller changed.
(try_font_list): New arg PATTERN.  Caller changed.  If PATTERN is
a string, just call font_list with it.
(choose_face_font): Arguments FACE and C deleted.  New arg
FONT_SPEC.  Caller changed.
(realize_face): Arguments C and BASE_FACE deleted.  Caller
(realize_x_face): Likewise.
(realize_non_ascii_face): New function.
(realize_x_face): Call load_face_font here.
(realize_tty_face): Argument C deleted.  Caller changed.
(compute_char_face): If CH is not ascii, call FACE_FOR_CHAR to
get a face ID.
(dump_realized_face): Don't print charset of FACE.