Fix int/EMACS_INT use in ccl.c, cmds.c, data.c, dispnew.c.

Fix int/EMACS_INT use in ccl.c, cmds.c, data.c, dispnew.c.

 keyboard.c (make_lispy_position): Use EMACS_INT for buffer
 positions.
 xdisp.c (redisplay_internal, try_window_id)
 (set_cursor_from_row, find_first_unchanged_at_end_row): Use
 EMACS_INT for buffer positions.
 dispextern.h (set_cursor_from_row, mode_line_string)
 (marginal_area_string): Adjust prototypes.
 dispnew.c (increment_matrix_positions)
 (increment_row_positions, copy_glyph_row_contents)
 (mode_line_string, marginal_area_string): Use EMACS_INT for buffer
 positions.
 dispextern.h (mode_line_string, marginal_area_string)
 (increment_matrix_positions, increment_row_positions): Adjust
 prototypes.
 data.c (Faref, Faset): Use EMACS_INT for string length and
 positions.
 cmds.c (internal_self_insert): Use EMACS_INT for the count of
 characters to insert.
 ccl.c (Fccl_execute_on_string): Use EMACS_INT for string
 position and size.