TT#14008 avoid double free on shutdown

Change-Id: I30ca16313ee8039b51797b60955265fb4a7545a1
(cherry picked from commit bbc6aa9dac)

daemon/main.c

@@ -1039,7 +1039,8 @@ int main(int argc, char **argv) {
 	dtls_cert_free();
 
 	redis_close(rtpe_redis);
-	redis_close(rtpe_redis_write);
+	if (rtpe_redis_write != rtpe_redis)
+		redis_close(rtpe_redis_write);
 	redis_close(rtpe_redis_notify);
 
 	free_prefix();