Color balance causes Internal error: zoom factor = 0

[davidh]

Sorry again...

This is a strange bug as it generates the error message only when Color Balance is added for the first time just after the branch box.

1. add a Side-Branch
2. add Color Balance -> you get Internal error: zoom factor = 0
3. keep pressing Enter key until the error box closes and Color Balance transformation opens, c
4. add Color Balance -> no error message
5. close the branch box and add it again
6. add Color Balance -> you get Internal error: zoom factor = 0
etc.

The same happens also when you insert Color Balance between a branch box and an existing transformation in any branch. But again only once.

[jsachs]

Fixed for next release.