Prefer memset to repeatedly assigning Qnil

* alloc.c (allocate_pseudovector): Catch more bogus values.
* alloc.c (allocate_pseudovector):
* callint.c (Fcall_interactively):
* coding.c (syms_of_coding):
* fringe.c (init_fringe):
Verify that Qnil == 0.
* callint.c (Fcall_interactively):
* eval.c (Fapply, Ffuncall):
* fns.c (mapcar1, larger_vector):
* font.c (font_expand_wildcards):
* fringe.c (init_fringe):
Prefer memset to assigning zeros by hand.
* callint.c (Fcall_interactively):
Remove duplicate assignment of Qnil to args[i].
* coding.c (syms_of_coding):
Prefer LISP_INITIALLY_ZERO to assigning zeros by hand.
* fileio.c (Ffile_selinux_context):
Rewrite to avoid need for Lisp_Object array.
* lisp.h (XLI_BUILTIN_LISPSYM): New macro.
(DEFINE_LISP_SYMBOL_END): Use it.
(NIL_IS_ZERO): New constant.
(memsetnil): New function.

1 files changed, 3 insertions, 6 deletions

diff --git a/src/coding.c b/src/coding.c
index b11143a32fb..77cea77cef5 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -11272,13 +11272,10 @@ internal character representation.  */);
     Vtranslation_table_for_input = Qnil;
 
   {
-    Lisp_Object args[coding_arg_undecided_max];
-    Lisp_Object plist[16];
-    int i;
-
-    for (i = 0; i < coding_arg_undecided_max; i++)
-      args[i] = Qnil;
+    verify (NIL_IS_ZERO);
+    Lisp_Object args[coding_arg_undecided_max] = { LISP_INITIALLY_ZERO, };
 
+    Lisp_Object plist[16];
     plist[0] = intern_c_string (":name");
     plist[1] = args[coding_arg_name] = Qno_conversion;
     plist[2] = intern_c_string (":mnemonic");