Set the lp_sent bool earlier to minimise the number of extra longpolls sent out.

cgminer.c

@@ -1593,6 +1593,7 @@ static bool get_upstream_work(struct work *work, bool lagging)
 	/* If this is the current pool and supports longpoll but has not sent
 	 * a longpoll, send one now */
 	if (unlikely(pool == current_pool() && !pool->is_lp && pool->hdr_path && !pool->lp_sent)) {
+		pool->lp_sent = true;
 		req_longpoll = true;
 		url = pool->lp_url;
 	}

util.c

@@ -301,12 +301,10 @@ json_t *json_rpc_call(CURL *curl, const char *url,
 		curl_easy_setopt(curl, CURLOPT_USERPWD, userpass);
 		curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
 	}
-	if (longpoll) {
-		pool->lp_sent = true;
 #ifdef CURL_HAS_SOCKOPT
+	if (longpoll)
 		curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, json_rpc_call_sockopt_cb);
 #endif
-	}
 	curl_easy_setopt(curl, CURLOPT_POST, 1);
 
 	if (opt_protocol)