little fix to WiFiSTA.cpp

Now SmartConfig works! Tested on ESP32

Author: allex1978

libraries/WiFi/src/WiFiSTA.cpp

@@ -624,7 +624,9 @@ void WiFiSTAClass::_smartConfigCallback(uint32_t st, void* result) {
         log_d("Type: %s", sc_type_strings[*type % 3]);
     } else if (status == SC_STATUS_LINK) {
         wifi_sta_config_t *sta_conf = reinterpret_cast<wifi_sta_config_t *>(result);
+        
         log_d("SSID: %s", (char *)(sta_conf->ssid));
+        sta_conf->bssid_set = 0;
         esp_wifi_set_config(WIFI_IF_STA, (wifi_config_t *)sta_conf);
         esp_wifi_connect();
         _smartConfigDone = true;