Scaling images + view updates

[Adrian Page]

Bart Coppens wrote:
> So, scaling an image doesn't update the view (projection?) anymore, but 
> looking at the code brings me to KisImage::notify, but I don't feel very 
> comfortable in that piece of code (especially now that there might be changes 
> in that piece). Maybe somebody else could have a look at it? (It still worked 
> a few weeks ago, afaik)

Scale image works fine here but scale layer doesn't have a notify call. 
I fixed some other things that didn't notify but left this one out 
because it's using the old scaling code rather than the new transforming 
code, so is going to change anyway - from what I've read.

Adrian