fix assets.parse_model with 'xml' format

src/logic/scripting/lua/libs/libassets.cpp

@@ -55,7 +55,9 @@ static int l_parse_model(lua::State* L) {
     auto name = lua::require_string(L, 3);
     
     if (format == "xml" || format == "vcm") {
-        engine->getAssets()->store(vcm::parse(name, string), name);
+        engine->getAssets()->store(
+            vcm::parse(name, string, format == "xml"), name
+        );
     } else {
         throw std::runtime_error("unknown format " + util::quote(std::string(format)));
     }