From c01619819182752e4d98e48d816d13d2a0a3a0b3 Mon Sep 17 00:00:00 2001
From: Alexander Gessler <alexander.gessler@gmx.net>
Date: Thu, 21 Mar 2013 20:17:09 +0100
Subject: [PATCH] aiMesh: fix copy constructor so issue [3572335] (and any
 further instances of the same pattern in creating face arrays) is resolved.

---
 include/assimp/mesh.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index 26084c77e..df257e7f1 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -160,8 +160,13 @@ struct aiFace
 
 		delete[] mIndices;
 		mNumIndices = o.mNumIndices;
-		mIndices = new unsigned int[mNumIndices];
-		::memcpy( mIndices, o.mIndices, mNumIndices * sizeof( unsigned int));
+		if (mNumIndices) {
+			mIndices = new unsigned int[mNumIndices];
+			::memcpy( mIndices, o.mIndices, mNumIndices * sizeof( unsigned int));
+		}
+		else {
+			mIndices = NULL;
+		}
 		return *this;
 	}