From 38aace457656c8533c548481804bc36370fbf97e Mon Sep 17 00:00:00 2001
From: TwinFan <twinfan@sonux.net>
Date: Sat, 14 Sep 2024 23:38:04 +0200
Subject: [PATCH] Fix/RealTraffic: Altitude processing in high pressure
 situations

---
 Src/LTRealTraffic.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Src/LTRealTraffic.cpp b/Src/LTRealTraffic.cpp
index fae0bf6..287fced 100644
--- a/Src/LTRealTraffic.cpp
+++ b/Src/LTRealTraffic.cpp
@@ -800,8 +800,8 @@ bool RealTrafficConnection::ProcessTrafficBuffer (const JSON_Object* pBuf)
             pos.f.onGrnd = GND_ON;
         else {
             pos.f.onGrnd = GND_OFF;
-            double d = jag_n(pJAc, RT_DRCT_BaroAlt);    // prefer baro altitude
-            if (d > 0.0) {
+            double d = jag_n_nan(pJAc, RT_DRCT_BaroAlt);    // prefer baro altitude
+            if (!std::isnan(d)) {
                 if (!std::isnan(rtWx.QNH))
                     d = BaroAltToGeoAlt_ft(d, rtWx.QNH);
                 pos.SetAltFt(d);