daemon/json, test/test_protocol: avoid gcc -O warnings.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/json.c

@@ -226,7 +226,8 @@ bool json_get_params(const char *buffer, const jsmntok_t param[], ...)
 {
 	va_list ap;
 	const char *name;
-	const jsmntok_t **tokptr, *p, *end;
+	 /* Uninitialized warnings on p and end */
+	const jsmntok_t **tokptr, *p = NULL, *end = NULL;
 
 	if (param->type == JSMN_ARRAY) {
 		if (param->size == 0)

test/test_protocol.c

@@ -998,7 +998,9 @@ static void do_cmd(struct peer *peer)
 	} else
 		errx(1, "%s: Unknown command %s", peer->name, cmd);
 
-	write(peer->cmddonefd, peer->info, strlen(peer->info)+1);
+	if (write(peer->cmddonefd, peer->info, strlen(peer->info)+1)
+	    != strlen(peer->info)+1)
+		abort();
 
 	/* We must always have (at least one) signed, unrevoked commit. */
 	for (ci = peer->local; ci; ci = ci->prev) {