stack.c: avoid arithmetic on pointers to voidHEADmaster

In stack.c r1.34 I converted one 'char *' too many to 'void *', thereby
relying on a gcc/clang extension which interprets the fictional void
type as a type of size 1 (that's what the stack code wants, fortunately).
As pointed out in the link below, -Wpointer-arith would have caught this:
https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html

MSVC flags this as follows:

D:\a\portable\portable\crypto\stack\stack.c(211,23): error C2036: 'const void *': unknown size [D:\a\portable\portable\build\crypto\crypto_obj.vcxproj].

Pull in workaround from the portable repo which undoes the char * -> void *
conversion.

ok jsing millert

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/stack/stack.c b/src/lib/libcrypto/stack/stack.c
index ed18688a31..dd9d8b8395 100644
--- a/src/lib/libcrypto/stack/stack.c
+++ b/src/lib/libcrypto/stack/stack.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: stack.c,v 1.34 2025/12/21 07:35:11 tb Exp $ */
+/* $OpenBSD: stack.c,v 1.35 2026/01/14 17:43:49 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -201,7 +201,7 @@ static const void *
 obj_bsearch_ex(const void *key, const void *base_, int num, int size,
     int (*cmp)(const void *, const void *))
 {
-        const void *base = base_;
+        const char *base = base_;
         int l, h, i, c;
 
         l = 0;