From 7c1fed98d21c697fca2ec4a6e1b2588a02a378fa Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver@mutability.co.uk>
Date: Thu, 15 Sep 2016 15:09:35 +0100
Subject: [PATCH] faup1090: entirely blank (all spaces) idents are not
 interesting

---
 net_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net_io.c b/net_io.c
index 5315163..928cb78 100644
--- a/net_io.c
+++ b/net_io.c
@@ -1904,7 +1904,7 @@ static void writeFATSV()
             p += snprintf(p, bufsize(p, end), "\taddrtype\t%s", addrtype_short_string(a->addrtype));
         }
 
-        if (trackDataValidEx(&a->callsign_valid, now, 15000, SOURCE_MODE_S_CHECKED) && a->callsign_valid.updated > a->fatsv_last_emitted) {
+        if (trackDataValidEx(&a->callsign_valid, now, 15000, SOURCE_MODE_S_CHECKED) && strcmp(a->callsign, "        ") != 0 && a->callsign_valid.updated > a->fatsv_last_emitted) {
             p += snprintf(p, bufsize(p,end), "\tident\t%s", a->callsign);
             switch (a->callsign_valid.source) {
             case SOURCE_MODE_S: