fix slimInputRead in NODE_MODE on faces

modules/slimFunction/slimFunction.cpp

@@ -1030,7 +1030,7 @@ void slimInputRead::operator()(functorCache &cm, fullMatrix<double> &val) const
       }
       else{
         const MElement *el = cm.element(i);
-        const auto &cl = cm.interfaceGroup()->closure(i,0);
+        const auto &cl = cm.interfaceGroup()->closure(cm.interfaceId(i),0);
         for (size_t j = 0; j < cl.size(); ++j){
           int node = cm.groupCollection().mesh().gmshVertexId(el->vertices()[cl[j]]);
           int index = _mapArray[node];