Correctly using NTPClient. Now with callback.

src/ntp.cpp

@@ -1,4 +1,13 @@
-#include "ntp.h"
+#include <ntp.h>
+#include "my_fastled.h"
+
+void updateCallback(NTPClient* c) {
+	random16_add_entropy(c->getEpochMillis() & 0xFFFF);
+}
 
 WiFiUDP ntpUDP;
 NTPClient ntpClient(ntpUDP, NTP_SERVER, NTP_OFFSET, NTP_INTERVAL);
+
+void ntp_setup() {
+	ntpClient.setUpdateCallback(updateCallback);
+}