Fix a couple of old-style functions

bin/varnishd/storage/stevedore.c

@@ -49,7 +49,7 @@ static pthread_mutex_t stv_mtx;
  */
 
 const struct stevedore *
-STV_next()
+STV_next(void)
 {
 	static struct stevedore *stv;
 	struct stevedore *r;

lib/libvarnish/vsa.c

@@ -183,7 +183,7 @@ static struct suckaddr bogo_ip_vsa;
 const struct suckaddr *bogo_ip = &bogo_ip_vsa;
 
 void
-VSA_Init()
+VSA_Init(void)
 {
 	struct addrinfo hints, *res = NULL;