Bitmap image offset bug solution

[Pete French]

In DPSimage at line 1758 the origin of the rectangle is set equal to
"point". But the resulting rectangle is passed to viewRectToX: which
takes vew co-oridinates, and as DPSimage is called with the view translated
and scaled such that the image starts at 0,0 then this leads to the offset
being applied twice - which is why the imagescome out in the wrong place.
Simply removing this line fixes the bug as the origin becomes 0,0 from
the initialisation at line 1700.

I  think I've got this right, but given the recent discussions about
co-oprdinate transformations on -discuss then I'd like someone to
verify it.

cheers,

-bat.