gps_data_t: Add datum field. Add decode for $PGRMM.

Sadly, $PGRMM is after a cycle ender and the data is never
reported, so no regression changes.  Cycle ender needs to get fixed...

1 files changed, 3 insertions, 0 deletions

diff --git a/gpsutils.c b/gpsutils.c
index 774b9707..c86608aa 100644
--- a/gpsutils.c
+++ b/gpsutils.c
@@ -363,6 +363,9 @@ void gps_merge_fix(struct gps_fix_t *to,
 	to->ecef.vz = from->ecef.vz;
 	to->ecef.vAcc = from->ecef.vAcc;
     }
+    if ('\0' != from->datum[0]) {
+        strlcpy(to->datum, from->datum, sizeof(to->datum));
+    }
 }
 
 /* NOTE: timestamp_t is a double, so this is only precise to