small fix in tools related to traits

[stéphane ducasse]

DONE!
will be shipped with 6720 :)

Stef


> Hi Stef
>
> I committed Tools-al.52 to the inbox. It includes the following  
> change:
>
> "Fixes browsing of traits, i.e., "TPureBehavior browse" which   
> incorrectly selected the class Trait"
>
> Adrian