Fixing issue #639 in a better way, that ensures TIME_SYNC_INTERVAL_RETRY is used over TIME_SYNC_INTERVAL when GPS time was invalid

src/timekeeper.cpp

@@ -49,13 +49,9 @@ void calibrateTime(void) {
 // no RTC -> fallback to GPS time
 #if (HAS_GPS)
     t = get_gpstime(&t_msec);
-    if (t) {
-      // only set time source to GPS if GPS time was actually valid
     timeSource = _gps;
-    }
 #endif
 
-    if (t)
     setMyTime((uint32_t)t, t_msec, timeSource); // set time
 
   } // fallback