Fix GC bugs related to uninitialized vectors

Avoid problems if GC occurs while initializing a vector.
Problem with Fdelete reported by Pip Cet in:
https://lists.gnu.org/r/emacs-devel/2020-08/msg00313.html
I looked for similar problems elsewhere and found quite a few.
* src/coding.c (make_subsidiaries):
* src/composite.c (syms_of_composite):
* src/font.c (build_style_table, Ffont_get_glyphs):
* src/nsselect.m (clean_local_selection_data):
* src/nsxwidget.m (js_to_lisp):
* src/syntax.c (init_syntax_once):
* src/window.c (Fcurrent_window_configuration):
* src/xselect.c (selection_data_to_lisp_data)
(clean_local_selection_data):
Use make_nil_vector instead of make_uninit_vector.
* src/fns.c (Fdelete):
* src/xwidget.c (webkit_js_to_lisp):
Use allocate_nil_vector instead of allocate_vector.
* src/search.c (Fnewline_cache_check):
Use make_vector instead of make_uninit_vector.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/font.c b/src/font.c
index ab00402b40b..ccbd3fc9ce6 100644
--- a/src/font.c
+++ b/src/font.c
@@ -4889,7 +4889,7 @@ the corresponding element is nil.  */)
 {
   struct font *font = CHECK_FONT_GET_OBJECT (font_object);
   ptrdiff_t len;
-  Lisp_Object *chars, vec;
+  Lisp_Object *chars;
   USE_SAFE_ALLOCA;
 
   if (NILP (object))
@@ -4957,7 +4957,7 @@ the corresponding element is nil.  */)
   else
     wrong_type_argument (Qarrayp, object);
 
-  vec = make_uninit_vector (len);
+  Lisp_Object vec = make_nil_vector (len);
   for (ptrdiff_t i = 0; i < len; i++)
     {
       Lisp_Object g;
@@ -5203,7 +5203,7 @@ If the named font cannot be opened and loaded, return nil.  */)
 static Lisp_Object
 build_style_table (const struct table_entry *entry, int nelement)
 {
-  Lisp_Object table = make_uninit_vector (nelement);
+  Lisp_Object table = make_nil_vector (nelement);
   for (int i = 0; i < nelement; i++)
     {
       int j;