[Lazarus] r16541 doesn't show about box

[Luca Olivetti]

I notice that in the OnDragOver event Source no longer contains a 
TDragObject, but instead contains the actual TObject instance being dragged.

1. When was this changed and why?
2. Will this now remain the way it is for the forseeable future or is it 
likely to change back to TDragObject?

The reason why I ask is that, drag and drop code that was working fine 6 
months ago, no longer works, so I'm just trying to get an idea of how 
much this code is likely to change in the next 2 months.

Thanks,


Dominique.