client: confirm sin_zero actual size for platform

in some platform， the size of sa46.sa4.sin_zero is not 8, but 6, so use 8 will cause coredump.

lib/roles/http/client/client-handshake.c

@@ -264,9 +264,10 @@ create_new_conn:
 	 * to whatever we decided to connect to
 	 */
 
-       lwsl_info("%s: %p: address %s\n", __func__, wsi, ads);
+	lwsl_info("%s: %p: address %s\n", __func__, wsi, ads);
 
-       n = lws_getaddrinfo46(wsi, ads, &result);
+	n = lws_getaddrinfo46(wsi, ads, &result);
+	memset(&sa46, 0, sizeof(sa46));
 
 #ifdef LWS_WITH_IPV6
 	if (wsi->ipv6) {
@@ -282,8 +283,6 @@ create_new_conn:
 
 		sa6 = ((struct sockaddr_in6 *)result->ai_addr);
 
-		memset(&sa46, 0, sizeof(sa46));
-
 		sa46.sa6.sin6_family = AF_INET6;
 		switch (result->ai_family) {
 		case AF_INET:
@@ -363,7 +362,7 @@ create_new_conn:
 
 		sa46.sa4.sin_family = AF_INET;
 		sa46.sa4.sin_addr = *((struct in_addr *)p);
-		bzero(&sa46.sa4.sin_zero, 8);
+		bzero(&sa46.sa4.sin_zero, sizeof(sa46.sa4.sin_zero));
 	}
 
 	if (result)