[PATCH] Configure: fix warnings in a few feature tests

[Piotr Sikora]

# HG changeset patch
# User Piotr Sikora <piotr at aviatrix.com>
# Date 1714589586 0
#      Wed May 01 18:53:06 2024 +0000
# Node ID c083cd8ead811426c6f7bd7c4ab58a413d80be52
# Parent  49dce50fad40bf09db81ca2a35983ecd7b740e43
Configure: fix warnings in a few feature tests.

Signed-off-by: Piotr Sikora <piotr at aviatrix.com>

diff -r 49dce50fad40 -r c083cd8ead81 auto/unix
--- a/auto/unix	Tue Apr 16 18:29:59 2024 +0400
+++ b/auto/unix	Wed May 01 18:53:06 2024 +0000
@@ -731,7 +731,7 @@
 ngx_feature_incs=
 ngx_feature_path=
 ngx_feature_libs=
-ngx_feature_test="char buf[1]; ssize_t n; n = pwrite(1, buf, 1, 0);
+ngx_feature_test="const char buf[1] = \"\"; ssize_t n; n = pwrite(1, buf, 1, 0);
                   if (n == -1) return 1"
 . auto/feature
 
@@ -760,7 +760,7 @@
 ngx_feature_incs='#include <string.h>'
 ngx_feature_path=
 ngx_feature_libs=
-ngx_feature_test="char *p; p = strerrordesc_np(0);
+ngx_feature_test="const char *p; p = strerrordesc_np(0);
                   if (p == NULL) return 1"
 . auto/feature