Ignore unterminated string initialization for hexchar

gcc v15+ will add the check for unterminated string initialization
as a default, thus causing the build to fail due to the hexchar
function. Since this function uses the char array only for mapping
an integer to a hexadecimal char, this error can be ignored.

Signed-off-by: Michael Engel <mengel@redhat.com>

src/libbluechi/bus/utils.c

@@ -250,10 +250,16 @@ int assemble_object_path_string(const char *prefix, const char *name, char **res
         return asprintf(res, "%s/%s", prefix, escaped);
 }
 
+// Disabling -Wunterminated-string-initialization temporarily.
+// hexchar uses the table array only for mapping an integer to
+// a hexadecimal char, no need for it to be NULL terminated.
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunterminated-string-initialization"
 static char hexchar(int x) {
         static const char table[16] = "0123456789abcdef";
         return table[(unsigned int) x % sizeof(table)];
 }
+#pragma GCC diagnostic pop
 
 char *bus_path_escape(const char *s) {