iconSize() == 0

[Maks Orlovich]

Hi.. Looking at iconview performance some more, I've noticed we re-calculate 
the icon size-dependent stuff frequently even when we don't have to, despite 
the if ( size == m_pIconView->iconSize() ) check in 
KonqKfmIconView::newIconSize, because many directories somehow get iconSize = 
0 into their .directoy files. It seems we default to this in the 
KonqPropsView ctor. I wonder whether this is intentional, and if so, what the 
semantic of the 0 is supposed to be...