rem: static Bool defPrepareForDragOperation(WMView *self, WMDraggingInfo *info)
add: defPrepareForDragOperation(WMView *self, WMDraggingInfo *info)
context: static Bool defPrepareForDragOperation(WMView *self, WMDraggingInfo *info){    printf("%x drag prep\n", W_VIEW_DRAWABLE(self));        return False;}