MaterialInplaceForm: magnetization UI: fix ref to temp object

GUI/View/SampleDesigner/MaterialInplaceForm.cpp

@@ -113,11 +113,10 @@ void MaterialInplaceForm::createWidgets()
     }
 
     // -- Create UI for magnetization vector
-    VectorProperty mag = material->magnetization();
     const auto setNewValue = [this](double value, DoubleProperty& d) {
         m_ec->setMaterialValue(m_item, value, d);
     };
-    LayerEditorUtils::addVectorToGrid(m_layout, col, mag, setNewValue, true, false);
+    LayerEditorUtils::addVectorToGrid(m_layout, col, material->magnetization(), setNewValue, true, false);
 
     // -- Create UI for material selection button
     auto* btn = new QPushButton("...", this);