Fix missing initial stratum notify in proxy mode

src/stratifier.c

@@ -5961,8 +5961,10 @@ static void suggest_diff(ckpool_t *ckp, stratum_instance_t *client, const char *
 }
 
 /* Send diff first when sending the first stratum template after subscribing */
-static void init_client(sdata_t *sdata, const stratum_instance_t *client, const int64_t client_id)
+static void init_client(const stratum_instance_t *client, const int64_t client_id)
 {
+	sdata_t *sdata = client->sdata;
+
 	stratum_send_diff(sdata, client);
 	stratum_send_update(sdata, client_id, true);
 }
@@ -6079,7 +6081,7 @@ static void parse_method(ckpool_t *ckp, sdata_t *sdata, stratum_instance_t *clie
 		json_object_set_new_nocheck(val, "error", json_null());
 		stratum_add_send(sdata, val, client_id, SM_SUBSCRIBERESULT);
 		if (likely(client->subscribed))
-			init_client(sdata, client, client_id);
+			init_client(client, client_id);
 		return;
 	}