Crashfix for 3ds Max export

code/nel/tools/3d/plugin_max/nel_mesh_lib/calc_lm.cpp

@@ -293,9 +293,12 @@ void SLightBuild::convertFromMaxLight (INode *node,TimeValue tvTime)
 	for (sint i = 0; i < exclusionList.Count(); ++i)
 	{
 		INode *exclNode = exclusionList[i];
+		if (exclNode) // Crashfix // FIXME: Why is this NULL?
+		{
 			string tmp = exclNode->GetName();
 			this->setExclusion.insert(tmp);
 		}
+	}
 #endif // (MAX_RELEASE < 4000)
 
 	// Get Soft Shadow information