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)
commite0b3e912e168c7d59dff16a560e9af7092364de7
treec4c18e57615b7a947828b1cb36b6e04529273ce0
parent3ffa612093ac4851e15d5870613ec59d03ec8d47
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.

git-svn-id: http://gpsbabel.googlecode.com/svn/trunk@875 f51c46e8-681c-474f-0cfe-069cfd0219fb
gpsbabel/nmea.c