Fix more uses of int instead of EMACS_INT.

Fix more uses of int instead of EMACS_INT.

 xdisp.c (check_point_in_composition, reconsider_clip_changes):
 Use EMACS_INT for buffer position variables and arguments.
 composite.c (get_composition_id, find_composition)
 (run_composition_function, compose_text)
 (composition_gstring_width, autocmp_chars)
 (composition_update_it, Ffind_composition_internal): Use EMACS_INT
 for buffer positions and string length variables and arguments.
 composite.h (get_composition_id, find_composition, compose_text)
 (composition_gstring_width): Adjust prototypes.
 editfns.c (Fformat): Use EMACS_INT for string size variables.
 xdisp.c (store_mode_line_noprop, display_mode_element): Use
 EMACS_INT for string positions.
 intervals.c (get_property_and_range): Use EMACS_INT for buffer
 position arguments.
 intervals.h (get_property_and_range): Adjust prototype.
 character.c (parse_str_as_multibyte, str_as_multibyte)
 (parse_str_to_multibyte, str_to_multibyte, str_as_unibyte)
 (string_count_byte8, string_escape_byte8, c_string_width)
 (strwidth, lisp_string_width, multibyte_chars_in_text): Use
 EMACS_INT for string length variables and arguments.
 (string_escape_byte8): Protect against too long strings.
 character.h (parse_str_as_multibyte, str_as_multibyte)
 (parse_str_to_multibyte, str_to_multibyte, str_as_unibyte)
 (c_string_width, strwidth, lisp_string_width): Adjust
 prototypes.
 lisp.h (check_point_in_composition): Adjust prototype.