Fix incorrect deoptimization for logical not in an effect context.

Fix incorrect deoptimization for logical not in an effect context.

The baseline compiler does not materialize a value for expressions of
the form !expr in an effect context so the graph translation should
not produce such an environment, otherwise we risk targeting it by
deoptimization.

BUG=v8:1167
Committed: http://code.google.com/p/v8/source/detail?r=6833

[Mads Ager (chromium), 2011-02-17 12:50:05]

LGTM!