From e33aa7898ae7647ef1507d552e91175e0ee72115 Mon Sep 17 00:00:00 2001
From: Paul Riseborough <p-riseborough@live.com.au>
Date: Mon, 9 Nov 2015 22:29:47 +1100
Subject: [PATCH] AP_NavEKF2: Prevent return of uninitialised variable

---
 libraries/AP_NavEKF2/AP_NavEKF2.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/AP_NavEKF2/AP_NavEKF2.cpp b/libraries/AP_NavEKF2/AP_NavEKF2.cpp
index e6867522b8..a2b400ddb8 100644
--- a/libraries/AP_NavEKF2/AP_NavEKF2.cpp
+++ b/libraries/AP_NavEKF2/AP_NavEKF2.cpp
@@ -689,6 +689,8 @@ uint8_t NavEKF2::getActiveMag(int8_t instance)
     if (instance < 0 || instance >= num_cores) instance = primary;
     if (core) {
         return core[instance].getActiveMag();
+    } else {
+        return 255;
     }
 }