disambiguate sampleItem vs multilayer

GUI/View/SampleDesigner/SampleListModel.cpp

@@ -168,16 +168,16 @@ QModelIndex SampleListModel::createSampleFromPython()
         return {}; // any messages already shown to user; no dlg necessary anymore
 
 
-    auto* sample = PyImportAssistant::createMultiLayerItem(*multiLayer);
-    if (!sample)
+    auto* sampleItem = PyImportAssistant::createMultiLayerItem(*multiLayer);
+    if (!sampleItem)
         return {}; // any messages already shown to user; no dlg necessary anymore
 
-    sample->setDescription("Imported from python code");
+    sampleItem->setDescription("Imported from python code");
 
     const int row = m_multiLayerItems->multiLayerItems().size();
     beginInsertRows(QModelIndex(), row, row);
-    m_multiLayerItems->addMultiLayer(sample);
+    m_multiLayerItems->addMultiLayer(sampleItem);
     endInsertRows();
-    return indexForItem(sample);
+    return indexForItem(sampleItem);
 }
 #endif