CrossCastAnd: Fix issue with Phases.
CrossCastAnd: Fix issue with Phases.

Right part of and type should not be widened,
as dotty could have used non-widened type to drive type inference.

som-snytt/dotty,sjrd/dotty,reactormonk/dotty,lampepfl/dotty,som-snytt/dotty,sjrd/dotty,dotty-staging/dotty,dotty-staging/dotty,lampepfl/dotty,densh/dotty,som-snytt/dotty,lampepfl/dotty,dotty-staging/dotty,densh/dotty,som-snytt/dotty,lampepfl/dotty,sjrd/dotty,som-snytt/dotty,lampepfl/dotty,dotty-staging/dotty,reactormonk/dotty,sjrd/dotty,sjrd/dotty,dotty-staging/dotty