add static_assert to verify correct template parameter

GUI/Models/MesoCrystalItem.h

@@ -74,6 +74,9 @@ template <typename T> T* MesoCrystalItem::setOuterShapeType()
 
 template <typename T> T* MesoCrystalItem::createBasis()
 {
+    static_assert(std::is_base_of<ItemWithParticles, T>::value,
+                  "Class must be derived from ItemWithParticles");
+
     if (basisParticle() != nullptr)
         model()->removeItem(basisParticle());
     return model()->insertItem<T>(this, -1, T_BASIS_PARTICLE);