fix for gps time sync

src/gpsread.cpp

@@ -170,8 +170,10 @@ void gps_loop(void *pvParameters) {
 
       // (only) while device time is not set or unsynched, and we have a valid
       // GPS time, we trigger a device time update to poll time from GPS
-      if (timeSource == _unsynced && gpstime.isUpdated())
+      if (timeSource == _unsynced && gpstime.isUpdated()) {
+        now();
         calibrateTime();
+      }
 
     } // if