From 9e1aaa8b56ab036de5afe288abe857d5a57c6c92 Mon Sep 17 00:00:00 2001
From: Erik Hofman <erik@ehofman.com>
Date: Thu, 19 Jan 2017 23:14:39 +0100
Subject: [PATCH] Make a distinction between a null-pointer and the value of 0

---
 simgear/math/SGVec2.hxx | 2 +-
 simgear/math/SGVec3.hxx | 2 +-
 simgear/math/SGVec4.hxx | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/simgear/math/SGVec2.hxx b/simgear/math/SGVec2.hxx
index ec46475e..d1284d8e 100644
--- a/simgear/math/SGVec2.hxx
+++ b/simgear/math/SGVec2.hxx
@@ -49,7 +49,7 @@ public:
   /// Constructor. Initialize by the content of a plain array,
   /// make sure it has at least 2 elements
   explicit SGVec2(const T* d)
-  { _data = simd4_t<T,2>(d); }
+  { _data = d ? simd4_t<T,2>(d) : simd4_t<T,2>(T(0)); }
   template<typename S>
   explicit SGVec2(const SGVec2<S>& d)
   { data()[0] = d[0]; data()[1] = d[1]; }
diff --git a/simgear/math/SGVec3.hxx b/simgear/math/SGVec3.hxx
index e3964157..904ec1a8 100644
--- a/simgear/math/SGVec3.hxx
+++ b/simgear/math/SGVec3.hxx
@@ -59,7 +59,7 @@ public:
   /// Constructor. Initialize by the content of a plain array,
   /// make sure it has at least 3 elements
   explicit SGVec3(const T* d)
-  { _data = simd4_t<T,3>(d); }
+  { _data = d ? simd4_t<T,3>(d) : simd4_t<T,3>(T(0)); }
   template<typename S>
   explicit SGVec3(const SGVec3<S>& d)
   { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; }
diff --git a/simgear/math/SGVec4.hxx b/simgear/math/SGVec4.hxx
index bc7f2468..94fc8f52 100644
--- a/simgear/math/SGVec4.hxx
+++ b/simgear/math/SGVec4.hxx
@@ -46,7 +46,7 @@ public:
   /// Constructor. Initialize by the content of a plain array,
   /// make sure it has at least 3 elements
   explicit SGVec4(const T* d)
-  { _data = simd4_t<T,4>(d); }
+  { _data = d ? simd4_t<T,4>(d) : simd4_t<T,4>(T(0)); }
   template<typename S>
   explicit SGVec4(const SGVec4<S>& d)
   { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; data()[3] = d[3]; }