fixed a bug in the way snip->value handlers supplied by tools were handled.
fixed a bug in the way snip->value handlers supplied by tools were handled.

svn: r2643

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket