$OpenBSD: patch-code_D3MFOpcPackage_cpp,v 1.1.1.1 2017/11/14 06:29:25 bentley Exp $
From upstream def42bf624c99df8747f3ab9d065374e995b2617.
Index: code/D3MFOpcPackage.cpp
--- code/D3MFOpcPackage.cpp.orig
+++ code/D3MFOpcPackage.cpp
@@ -49,6 +49,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY O
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/ai_assert.h>
 
+#include <cstdlib>
 #include <memory>
 #include <vector>
 #include <map>
