[Bf-committers] Border zoom patch

[trip somewhere]

Woa.. very involved .. All I know is that I have never seen this slow
to a stop behaviour in any other app. Be it good or bad I can zoom
"dolly" to infinity. And in blender if I postion the cursor  past the
object I can replicate that behaviour just fine.

But hey,, it's up to you to deside if you want to change it, I can
only give a users option idea