Prefer NILP (x) to EQ (x, Qnil)

This simplifies the code a bit, and also simplifies some
potential future changes slightly (e.g., altering eq vs eql).
* src/alloc.c (mark_object):
* src/callint.c (fix_command):
* src/chartab.c (Fchar_table_range, Fset_char_table_range):
* src/dbusbind.c (XD_OBJECT_TO_DBUS_TYPE, xd_signature):
* src/dired.c (Fsystem_users):
* src/fileio.c (Fdo_auto_save):
* src/fns.c (concat):
* src/frame.c (get_frame_param, frame_inhibit_resize)
(store_in_alist, store_frame_param, x_set_autoraise)
(x_set_autolower, x_get_arg):
* src/image.c (Fclear_image_cache):
* src/intervals.c (intervals_equal):
* src/intervals.h (DEFAULT_INTERVAL_P):
* src/lread.c (substitute_object_recurse):
* src/menu.c (digest_single_submenu)
(find_and_call_menu_selection)
(find_and_return_menu_selection):
* src/nsfns.m (x_set_icon_name, Fx_create_frame):
* src/nsmenu.m (ns_menu_show):
* src/nsselect.m (ns_string_to_pasteboard_internal)
(Fns_selection_exists_p, Fns_selection_owner_p):
* src/process.c (Faccept_process_output)
(wait_reading_process_output):
* src/terminal.c (store_terminal_param):
* src/textprop.c (verify_interval_modification):
* src/xdisp.c (next_element_from_buffer):
* src/xfaces.c (Finternal_set_lisp_face_attribute):
* src/xfns.c (x_set_icon_type, Fx_synchronize):
* src/xmenu.c (x_menu_show):
* src/xselect.c (Fx_selection_owner_p)
(Fx_selection_exists_p):
* src/xwidget.c (xwidget_view_lookup):
Prefer NILP (x) to EQ (x, Qnil).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lread.c b/src/lread.c
index 4ce6a442c36..4eba8635521 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -3603,7 +3603,7 @@ substitute_object_recurse (struct subst *subst, Lisp_Object subtree)
     return subtree;
 
   /* If we've been to this node before, don't explore it again.  */
-  if (!EQ (Qnil, Fmemq (subtree, subst->seen)))
+  if (!NILP (Fmemq (subtree, subst->seen)))
     return subtree;
 
   /* If this node can be the entry point to a cycle, remember that
@@ -4236,7 +4236,7 @@ usage: (unintern NAME OBARRAY)  */)
      session if we unintern them, as well as even more ways to use
      `setq' or `fset' or whatnot to make the Emacs session
      unusable.  Let's not go down this silly road.  --Stef  */
-  /* if (EQ (tem, Qnil) || EQ (tem, Qt))
+  /* if (NILP (tem) || EQ (tem, Qt))
        error ("Attempt to unintern t or nil"); */
 
   XSYMBOL (tem)->u.s.interned = SYMBOL_UNINTERNED;