[Kde-bindings] Adding an mf_attribute flag to MethodFlags in smoke.h

[Tobias Rautenkranz]

> If we're at it we could also add sizeof() information for classes (for
>  dynamic list marshallers)
If I understand correctly, you need the sizeof to make sure the class is 
stored on the heap by the container. 

e.g. QList<T> stores the objects directly in the array when
sizeof(T) <= sizeof(void*) and on the heap otherwise.

template <typename T>
Q_INLINE_TEMPLATE void QList<T>::node_construct(Node *n, const T &t)
{
  if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic)
    n->v = new T(t); // on the heap
  else if (QTypeInfo<T>::isComplex)
    new (n) T(t); // "placement new" -- in place
  else
   *reinterpret_cast<T*>(n) = t; // in place (no constructor)
}

A "Placement new" constructor is not supported by smoke, but one could still 
implement the marshaling for large types. (neglecting the third case)

Thus one could also use a cf_large flag instead of the sizeof?