Treat out-of-range positions consistently

If a position argument to get-byte etc. is an out-of-range integer,
treat it the same regardless of whether it is a fixnum or a bignum.
* src/buffer.c (fix_position): New function.
* src/buffer.c (validate_region):
* src/character.c (Fget_byte):
* src/coding.c (Ffind_coding_systems_region_internal)
(Fcheck_coding_systems_region):
* src/composite.c (Ffind_composition_internal):
* src/editfns.c (Fposition_bytes, Fchar_after, Fchar_before)
(Finsert_buffer_substring, Fcompare_buffer_substrings)
(Fnarrow_to_region):
* src/fns.c (Fsecure_hash_algorithms):
* src/font.c (Finternal_char_font, Ffont_at):
* src/fringe.c (Ffringe_bitmaps_at_pos):
* src/search.c (search_command):
* src/textprop.c (get_char_property_and_overlay):
* src/window.c (Fpos_visible_in_window_p):
* src/xdisp.c (Fwindow_text_pixel_size):
Use it instead of CHECK_FIXNUM_COERCE_MARKER, so that
the code is simpler and treats bignums consistently with fixnums.
* src/buffer.h (CHECK_FIXNUM_COERCE_MARKER): Define here
rather than in lisp.h, and reimplement in terms of fix_position
so that it treats bignums consistently with fixnums.
* src/lisp.h (CHECK_FIXNUM_COERCE_MARKER): Move to buffer.h.
* src/textprop.c (validate_interval_range): Signal with original
bounds rather than modified ones.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/fringe.c b/src/fringe.c
index 2a46e3c34f2..d8d80bb3fe9 100644
--- a/src/fringe.c
+++ b/src/fringe.c
@@ -1675,10 +1675,10 @@ Return nil if POS is not visible in WINDOW.  */)
 
   if (!NILP (pos))
     {
-      CHECK_FIXNUM_COERCE_MARKER (pos);
-      if (! (BEGV <= XFIXNUM (pos) && XFIXNUM (pos) <= ZV))
+      EMACS_INT p = fix_position (pos);
+      if (! (BEGV <= p && p <= ZV))
         args_out_of_range (window, pos);
-      textpos = XFIXNUM (pos);
+      textpos = p;
     }
   else if (w == XWINDOW (selected_window))
     textpos = PT;