Merge pull request #3454 from jsmaatta/master

Fix for issue #3445

code/AssetLib/XGL/XGLLoader.cpp

@@ -598,7 +598,7 @@ bool XGLImporter::ReadMesh(XmlNode &node, TempScope &scope) {
 	}
 
 	// finally extract output meshes and add them to the scope
-	typedef std::pair<unsigned int, TempMaterialMesh> pairt;
+	typedef std::pair<const unsigned int, TempMaterialMesh> pairt;
 	for (const pairt &p : bymat) {
 		aiMesh *const m = ToOutputMesh(p.second);
 		scope.meshes_linear.push_back(m);