Nyall Dawson 382098e188 [gps] Don't treat n/a values as '0'
Avoids reporting things like an unavailable heading as a real "0" heading
2019-12-06 04:50:53 +10:00
..
2018-06-30 09:24:38 +10:00
2019-06-24 19:29:02 +10:00
2019-12-06 04:50:53 +10:00

This was originally taken from http://nmea.sourceforge.net, which is now dead.

A fork is alive and well at https://gitlab.com/fhuberts/nmealib, however in the meantime we've diverged considerably and pulling in the changes from the fork is not trivial. Still, the new upstream makes a good reference when working here or checking on bugs!