I tried the change on the bus home, and made one more addition to that line:
if (device.fix[1] & location.GPS_DEVICE_LATLONG_SET) and (device.fix[1] & location.GPS_DEVICE_TIME_SET) and not (device.status & location.GPS_DEVICE_STATUS_NO_FIX):

N.B: I don't know if these changes have negative effects on battery drain or something else. Try these changes at your own risk.