[Gpsbabel-code] track output not in real time when sent to a pipe - a patch to fix it

[Roy R. <rr...@ih...>]

When you are doing a track with nmea output to a pipe the output gets 
buffered so it is not in real time. The following patch addresses this 
issue. I need this so I can send the output to navit.

Regards,
Roy Rankin

diff --git a/nmea.c b/nmea.c
index 4143e9d..058750d 100644
--- a/nmea.c
+++ b/nmea.c
@@ -1298,6 +1298,7 @@ nmea_trackpt_pr(const waypoint *wpt)
                 cksum = nmea_cksum(obuf);
                 gbfprintf(file_out, "$%s*%02X\n", obuf, cksum);
         }
+       gbfflush(file_out);
  }