util.crypto: Preemptively silence 'strict-prototypes' warning
With `gcc-12 -Wstrict-prototypes` the following warning is shown:
crypto.c:43:13: warning: function declaration isn't a prototype [-Wstrict-prototypes]
43 | static BIO* new_memory_BIO() {
| ^~~~~~~~~~~~~~
--- a/util-src/crypto.c Tue Jan 31 07:52:33 2023 +0100
+++ b/util-src/crypto.c Tue Jan 31 16:27:55 2023 +0100
@@ -40,7 +40,7 @@
#define PKEY_MT_TAG "util.crypto key"
-static BIO* new_memory_BIO() {
+static BIO* new_memory_BIO(void) {
return BIO_new(BIO_s_mem());
}