From John Hay:
authorrobertl <robertl@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Wed, 25 Aug 2004 13:12:08 +0000 (13:12 +0000)
committerrobertl <robertl@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Wed, 25 Aug 2004 13:12:08 +0000 (13:12 +0000)
commitf8626e045435e404ed5b904d3f81b25f91ce02f4
tree9df6982442b77d9d98bc252ef69659c417b63fb7
parente198b2b86e7d088b857e88d527868f44453e660e
From John Hay:
  added code to verify the checksum and discard the line if it doesn't match
  discard the line if the position fix wasn't valid.
  extract date from gprmc if available.
gpsbabel/nmea.c