SimpleObjectIterator is 16 bytes but allocated in memory pools

[xezon]

SimpleObjectIterator is 16 bytes but allocated in memory pools. This looks like a waste of space. It could simply be used as a stack object.

...
SimpleObjectIterator *iter = ThePartitionManager->iterateObjectsInRange(
	self, visionRange, FROM_CENTER_2D, filters); // <--- this allocates 16 byte iterator. Why??????
MemoryPoolObjectHolder hold(iter);
for (Object *them = iter->first(); them; them = iter->next())
{
...