Use a common start ping mechanism between threads.

src/connector.c

@@ -676,9 +676,12 @@ static void *receiver(void *arg)
 	}
 
 	/* Wait for the stratifier to be ready for us */
-	do {
+	while (42) {
 		buf = send_recv_proc(ckp->stratifier, "ping");
-	} while (!buf);
+		if (buf)
+			break;
+		cksleep_ms(10);
+	};
 	free(buf);
 
 	while (42) {

src/generator.c

@@ -3101,14 +3101,16 @@ void *generator(void *arg)
 	gdata->ckp = ckp;
 
 	if (ckp->proxy) {
-		char *buf = NULL;
+		char *buf;
 
 		/* Wait for the stratifier to be ready for us */
-		do {
-			cksleep_ms(10);
+		while (42) {
 			buf = send_recv_proc(ckp->stratifier, "ping");
-		} while (!buf);
-		dealloc(buf);
+			if (buf)
+				break;
+			cksleep_ms(10);
+		};
+		free(buf);
 		proxy_mode(ckp, pi);
 	} else
 		server_mode(ckp, pi);

src/stratifier.c

@@ -8021,9 +8021,9 @@ void *stratifier(void *arg)
 	pthread_t pth_blockupdate, pth_statsupdate, pth_heartbeat;
 	ckpool_t *ckp = pi->ckp;
 	int64_t randomiser;
-	char *buf = NULL;
 	sdata_t *sdata;
 	int threads;
+	char *buf;
 
 	rename_proc(pi->processname);
 	LOGWARNING("%s stratifier starting", ckp->name);
@@ -8033,12 +8033,15 @@ void *stratifier(void *arg)
 	sdata->verbose = true;
 
 	/* Wait for the generator to have something for us */
-	do {
+	while (42) {
 		if (ckp->proxy)
 			break;
 		buf = send_recv_proc(ckp->generator, "ping");
-	} while (!buf);
-	dealloc(buf);
+		if (buf)
+			break;
+		cksleep_ms(10);
+	};
+	free(buf);
 
 	if (!ckp->proxy) {
 		if (!generator_checkaddr(ckp, ckp->btcaddress)) {