From f08566603270c43de352f96f650a8593bf332c12 Mon Sep 17 00:00:00 2001
From: Tom Pittenger <magicrub@gmail.com>
Date: Fri, 20 May 2016 12:28:46 -0700
Subject: [PATCH] AP_Common: fix compile when using AP_TERRAIN_AVAILABLE 0

---
 libraries/AP_Common/Location.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libraries/AP_Common/Location.cpp b/libraries/AP_Common/Location.cpp
index c2c0ec24f6..187416651a 100644
--- a/libraries/AP_Common/Location.cpp
+++ b/libraries/AP_Common/Location.cpp
@@ -128,13 +128,17 @@ bool Location_Class::get_alt_cm(ALT_FRAME desired_frame, int32_t &ret_alt_cm) co
     }
 
     // check for terrain altitude
-    float alt_terr_cm;
+    float alt_terr_cm = 0;
     if (frame == ALT_FRAME_ABOVE_TERRAIN || desired_frame == ALT_FRAME_ABOVE_TERRAIN) {
+#if AP_TERRAIN_AVAILABLE
         if (_ahrs == NULL || _terrain == NULL || !_terrain->height_amsl(*(Location *)this, alt_terr_cm, true)) {
             return false;
         }
         // convert terrain alt to cm
         alt_terr_cm *= 100.0f;
+#else
+        return false;
+#endif
     }
 
     // convert alt to absolute