OFF: AI_MATKEY_TWOSIDED is now always set to 1.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@405 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/OFFLoader.cpp

@@ -203,6 +203,9 @@ void OFFImporter::InternReadFile( const std::string& pFile,
 	aiColor4D clr(0.6f,0.6f,0.6f,1.0f);
 	pcMat->AddProperty(&clr,1,AI_MATKEY_COLOR_DIFFUSE);
 	pScene->mMaterials[0] = pcMat;
+
+	const int twosided =1;
+	pcMat->AddProperty(&twosided,1,AI_MATKEY_TWOSIDED);
 }
 
 #endif // !! ASSIMP_BUILD_NO_OFF_IMPORTER