only announce values when there is a valid uid.

apps/aqhome-nodes/db.c

@@ -353,6 +353,7 @@ void _handleMsgFlashReady(AQHOMED *aqh, const GWEN_MSG *msg)
       _assignDeviceId(aqh, ni, uid);
     _updateTimestampLastChange(ni);
     AQH_NodeDb_SetModified(aqh->nodeDb);
+    if (uid!=0x00000000L && uid!=0xffffffff)
       _announceNodeValues(aqh, ni);
   }
   else {